[A] Power/resetting problems - should I return my "new" phone?

[Septfox]

Post-end edit and TL;DR for others having the sort of problems I was:
The power button will, if held in (or stuck engaged) for 10 seconds, reset the phone. Unconditionally. If your phone starts randomly resetting after the power button is pressed (or after you press it, the shutdown menu appears, then the phone resets), your power button is sticky and needs to be replaced. Save yourself some frustration and stop using the button to sleep/wake your phone. Pop the keyboard slider open half an inch to wake it up, use a widget or one of CM and SlimKat's many shortcuts to put it to sleep. Unless you're still on stock JB, in which case quit being on stock JB you square you're probably limited to widgets.

---

Bought a D4 off ebay. According to the seller, there's nothing wrong with it, aside from "the power button occasionally does not work".

And until this afternoon, not even that. The phone was working flawlessly. So, I sat down and flashed it so I could transfer my PagePlus account over, which also seemed to be successful; 1x and 3g signals, nice and strong. And even after that, it was fine for a bit.

Then, I go to put the phone to sleep...and it wouldn't. The power switch problem that the seller described rearing its ugly head, seemingly. So I kept trying, and every few button presses, the shutdown menu came up, rather than the device sleeping. Seemed like a sticky button, easy enough to fix.

And then...the phone reset itself. And now, when it's woken with the button, there's a decent chance that it resets itself within 10 seconds of leaving the lock screen; assuming it even wakes up with the button, which seems to be rather hit-and-miss. Putting the phone to sleep with the button is equally fidgety, but doesn't seem to be able to reset it.

I'd already planned on replacing the button, if necessary; I'm not at all afraid of opening the phone up. What concerns me is the self-resetting, which as I understand the Droid 4 is only supposed to do if the power button and volume- buttons are held; I haven't so much as touched the volume buttons since this started.

Should I send it back for a refund, or is the self-reset behavior a symptom of a stuck/failing power button, and likely to go away if I open it up and replace it?

 

[sd_shadow]

My power button did same thing a year ago.
The power button is two parts external and internal
I took it apart and pulled the external part off, it just pulls straight off.
Now need a pen or something to press button, but normally use a widget to turn screen off and use an volume button app to turn screen on
There are replacement power buttons on eBay but never got around to it.

Sent from my DROIDX using Tapatalk

 

[Septfox]

My power button did same thing a year ago.
The power button is two parts external and internal
I took it apart and pulled the external part off, it just pulls straight off.

So wait. Despite how loose/flimsy it feels, it's actually the external plastic bit getting stuck/hung up? I figured it was the actual button being gunked up (poor-quality grease or somesuch) and sticking.

And, is the phone supposed to reboot if only the power button is "held", then? That's what I'm primarily worried about; whether the power button is responsible for the reboots, or it started at the same time by coincidence and something else is actually wrong.

 

[sd_shadow]

With mine the exterior part was sticking and causing reboots, yours may be different

Sent from my DROIDX using Tapatalk

 

[Septfox]

Hmm, seems to be different indeed. Out of curiosity, I very carefully slipped a screwdriver in above the plastic button to open a small gap, and clicked the actual hardware button with a small paperclip...nothing. Holding it long enough seems to eventually make contact and put the phone to sleep, clicking it repeatedly sometimes causes the shutdown menu to come up (and shortly thereafter a reboot)...

Very strange behavior. Think I have some electrical contact cleaner around here somewhere, maybe I can squirt some of that down into the button...failing that, I guess I can live with it, hoping it's just the button itself and not something wonky with the board logic, and eventually change the button for something a bit higher quality...

 

[LuH]

Hmm, seems to be different indeed. Out of curiosity, I very carefully slipped a screwdriver in above the plastic button to open a small gap, and clicked the actual hardware button with a small paperclip...nothing. Holding it long enough seems to eventually make contact and put the phone to sleep, clicking it repeatedly sometimes causes the shutdown menu to come up (and shortly thereafter a reboot)...

Very strange behavior. Think I have some electrical contact cleaner around here somewhere, maybe I can squirt some of that down into the button...failing that, I guess I can live with it, hoping it's just the button itself and not something wonky with the board logic, and eventually change the button for something a bit higher quality...

This happened to my old SE XPERIA X2, the switch wore off. In this case I got the switch replaced under warranty claim.
Generally all the faulty micro switches I opened had somehow faulty flat spring inside. If it is the case, it won't click soundly when pressed. Then you need to replace the whole switch (or the spring if you can find the same), no cleaning can help.

I can't imagine any valid SW situation leading to reboot because of pressing only the power switch - unless you installed some utility to do it, which I doubt. Maybe the Vol Down button is faulty/sticky too?

I'd try to clean the insides first (if the cleaner gets inside the switches, even better), and if that doesn't help, get inside and check these two switches yourself. You can't get a refund then though

 

[Septfox]

Generally all the faulty micro switches I opened had somehow faulty flat spring inside. If it is the case, it won't click soundly when pressed. Then you need to replace the whole switch (or the spring if you can find the same), no cleaning can help.

Mine makes a clicking sound and seems to return after being pressed. However, comparing it to the volume buttons (which look to be the same switch going by the teardown pictures I've seen), it does sound and feel slightly less "crisp".

I can't imagine any valid SW situation leading to reboot because of pressing only the power switch - unless you installed some utility to do it, which I doubt. Maybe the Vol Down button is faulty/sticky too?

Yea, completely stock, since I was flashing the phone over to PP before doing anything else.
I was kind of hoping someone on stock or modified stock would come in and test it for me; hold the button down for a good 10-20 seconds, see what happens. It's not supposed to happen, but I've read elsewhere online that it's one of the symptoms of a sticky button.

Curiously, the Volume- key seems to be working perfectly, sounds and feels like I would expect.

I'd try to clean the insides first (if the cleaner gets inside the switches, even better), and if that doesn't help, get inside and check these two switches yourself. You can't get a refund then though

I actually have some "QR Electrical Cleaner" here that I obtained from Walmart a while back...unfortunately someone lost the nozzle, so I can't get a concentrated blast down around the switch stem :\
Wedging the plastic external button aside and spraying it in the general direction of the top of the switch doesn't seem to have done anything, unfortunately. I think these switches are probably semi-sealed unless in the pressed position, which is going to make things interesting...

And yes, you're right, doing anything further would technically void the warranty. Thinking about it, though, I actually did get a pretty good deal; the phone is obviously a return from a customer who found the problem early on, as it's basically new in condition with a completely unscratched screen. Even if I can't get the button working right, the phone wakes up with the keyboard, and a notification widget puts it to sleep...and if the button isn't used to wake it, it doesn't seem to stick (or at least register as it), so the phone continues working properly. So, a mostly-perfect phone, for all of $27.50, with the potential to be perfect.

Once my screen protector gets here and I'm not afraid of scratching the glass up, I think I'll open it and see what I can find out. It should be easy enough to short the contacts at the rear of the switch and see that the board is working properly; if so, then I can go hunting for a compatible switch. I can't seem to find any direct replacements, unfortunately.

Which reminds me, any guesses as to why there are three poles on the switch rather than two?
Edit: nevermind, looking at pictures it seems that the two "outer" pins attach to the common pad on the board, while the center pin is attached to the appropriate circuitry.

 

[LuH]

Mine makes a clicking sound and seems to return after being pressed. However, comparing it to the volume buttons (which look to be the same switch going by the teardown pictures I've seen), it does sound and feel slightly less "crisp".

Sounds like a swan's song...

Yea, completely stock, since I was flashing the phone over to PP before doing anything else.
I was kind of hoping someone on stock or modified stock would come in and test it for me; hold the button down for a good 10-20 seconds, see what happens. It's not supposed to happen, but I've read elsewhere online that it's one of the symptoms of a sticky button.

Luckily I just fastbooted mine Completely stock 188, only rooted and with SS installed - which should make no difference. To my complete surprise, while holding the power down, it shows the Power menu after 2 secs and forcibly reboots after 10 seconds. So I guess your only problem is the power button :good:

And yes, you're right, doing anything further would technically void the warranty. Thinking about it, though, I actually did get a pretty good deal; the phone is obviously a return from a customer who found the problem early on, as it's basically new in condition with a completely unscratched screen. Even if I can't get the button working right, the phone wakes up with the keyboard, and a notification widget puts it to sleep...and if the button isn't used to wake it, it doesn't seem to stick (or at least register as it), so the phone continues working properly. So, a mostly-perfect phone, for all of $27.50, with the potential to be perfect.

Great catch If you find another, let me know

Once my screen protector gets here and I'm not afraid of scratching the glass up, I think I'll open it and see what I can find out. It should be easy enough to short the contacts at the rear of the switch and see that the board is working properly; if so, then I can go hunting for a compatible switch. I can't seem to find any direct replacements, unfortunately.

I actually bought one two years ago while buying mine D4 to have the whole package stuffed with all imaginable replacement parts sent from the US - postage to Europe was about 1/3 of the whole price. I never used any of the replacement parts yet, guess I got lucky I don't have it on me now though...

Which reminds me, any guesses as to why there are three poles on the switch rather than two?
Edit: nevermind, looking at pictures it seems that the two "outer" pins attach to the common pad on the board, while the center pin is attached to the appropriate circuitry.

My guess is in some other devices the switch may switch between two circuits, not just break/connect the circuit. I think most of the switches I saw had the unnecessary third leg. Also it may help it hold tighter to the PCB.

 

[Septfox]

Luckily I just fastbooted mine Completely stock 188, only rooted and with SS installed - which should make no difference. To my complete surprise, while holding the power down, it shows the Power menu after 2 secs and forcibly reboots after 10 seconds. So I guess your only problem is the power button :good:

Awesome, thank you! Now I don't have to strip it down until I have a new switch in hand...though I'm still tempted to, just for fun. Strange that the phone can be rebooted by only holding the power button, though.

Great catch If you find another, let me know

Certainly. FYI, the seller I got it it from is named "soonersoft" if you want to use ebay's Follow Seller thing, by the looks of their listings they seem to mainly do business in items returned under warranty for damage/defects.

I actually bought one two years ago while buying mine D4 to have the whole package stuffed with all imaginable replacement parts sent from the US - postage to Europe was about 1/3 of the whole price. I never used any of the replacement parts yet, guess I got lucky I don't have it on me now though...

I've been thinking about it, and even if I could find a 1:1 replacement, it might be better to just replace it with an entirely different, more common switch. Having looked it up, power switch failures aren't incredibly frequent, but they are enough that I would rather have a more reliable (or at least, cheaper to replace), more standard design. Ebay is full of cheap bulk lots of microswitches, just gotta find one small enough.

My guess is in some other devices the switch may switch between two circuits, not just break/connect the circuit.

Yea, maybe. I just had the thought that it might alternatively be a dual-stage switch (e.g. as are used for cameras), with one of the stages disabled or defective to the extent that it could only be sold as a single-stage switch. Such would be a good way to get rid of components that would otherwise be garbage.
Whichever it is, it seems to me that such a small switch with so many moving parts inside, in a location and with a role that it sees a lot of use and abuse, is just asking for trouble...that the problem isn't more widespread is a testament to the quality of the switch manufacturer's design and assembly, I guess.

Regardless, it looks like only a dual-pole switch is actually needed, so that considerably widens the range of possibilities.

Thanks for the assistance, it has been invaluable. Now I can continue loading up and enjoying my phone without worrying that it's going to suddenly drop dead...well, more than the usual worrying, anyway

 

[LuH]

Awesome, thank you! Now I don't have to strip it down until I have a new switch in hand...though I'm still tempted to, just for fun. Strange that the phone can be rebooted by only holding the power button, though.

I know your feelings, even though I waited for a first issue to rationalize opening it up, which was only this summer, after almost two years. I'm still a student and the phone was ****load of money for me. Now that they are so cheap (and I don't see any potential replacement on the market as QWERTY devices vaporized) I'm not that cautious.

BTW most breakdown instructions or videos specify you'll only need T5 screwdriver but if you want to disassemble the display part as well, which you will need to, you'll need T3 as well (T4 still kinda fits to the screws, but it's T3). When you slide the diplay (or keyboard, depending on your point of view) out, you can see the small screws next to the outer rim.

Also, the phone heavily relies on adhesive - be sure to have plenty and be aware that after first opening the see-through plastic piece with rear camera, flash LED, hole for opening the back door and with two screws underneath will never look the same, you'll be lucky to have it somehow stick with most parts looking OK. I never saw anywhere replacement for this printed adhesive, the "HD 720p" sign gets semi-destroyed when opening it...

Certainly. FYI, the seller I got it it from is named "soonersoft" if you want to use ebay's Follow Seller thing, by the looks of their listings they seem to mainly do business in items returned under warranty for damage/defects.

Thanks

I've been thinking about it, and even if I could find a 1:1 replacement, it might be better to just replace it with an entirely different, more common switch. Having looked it up, power switch failures aren't incredibly frequent, but they are enough that I would rather have a more reliable (or at least, cheaper to replace), more standard design. Ebay is full of cheap bulk lots of microswitches, just gotta find one small enough.

Or you can do it the hardcore and noticeable way I used to fix out old home LCD monitor's faulty power switch - solder wires to the PCB, take it out the hole left after the switch plastic and solder to them a switch of your choosing that will hang outside the phone... You can tell people that it's an antenna that helps with bad reception in your area

Yea, maybe. I just had the thought that it might alternatively be a dual-stage switch (e.g. as are used for cameras), with one of the stages disabled or defective to the extent that it could only be sold as a single-stage switch. Such would be a good way to get rid of components that would otherwise be garbage.

Not likely IMO. This was marketed as luxurious device, I don't think they'd do it. Also the new switch isn't as expensive I guess, especially compared to all the advanced electronics inside.

Whichever it is, it seems to me that such a small switch with so many moving parts inside, in a location and with a role that it sees a lot of use and abuse, is just asking for trouble...that the problem isn't more widespread is a testament to the quality of the switch manufacturer's design and assembly, I guess.

Yup, I never understood how microswitches, especially those used in mouses, could take so much...

Regardless, it looks like only a dual-pole switch is actually needed, so that considerably widens the range of possibilities.

Thanks for the assistance, it has been invaluable. Now I can continue loading up and enjoying my phone without worrying that it's going to suddenly drop dead...well, more than the usual worrying, anyway

I'm glad I helped Enjoy your "brand new" slider

 

[Septfox]

BTW most breakdown instructions or videos specify you'll only need T5 screwdriver but if you want to disassemble the display part as well, which you will need to, you'll need T3 as well (T4 still kinda fits to the screws, but it's T3).

Good to know. As it turns out, I don't have anything below a T6 or 7, so no adventures in disassembly for me today.

Also, the phone heavily relies on adhesive - be sure to have plenty and be aware that after first opening the see-through plastic piece with rear camera, flash LED, hole for opening the back door and with two screws underneath will never look the same, you'll be lucky to have it somehow stick with most parts looking OK. I never saw anywhere replacement for this printed adhesive, the "HD 720p" sign gets semi-destroyed when opening it...

Fond memories of stripping my Ally down to the digitizer come back to me; everything simply snaps or bolts together and there's nary a drop of glue to be seen :<
I wonder if I can eyeball pictures of a removed plastic bit and use a straightblade bit to simply "drill" through mine to the screws...will have to keep it in mind when I evenetually open it up.
Any suggestions on what kind of glue to get? All I have around are hot glue and Gorilla Glue, neither of which strike me as particularly appropriate for this sort of thing.

Or you can do it the hardcore and noticeable way I used to fix out old home LCD monitor's faulty power switch - solder wires to the PCB, take it out the hole left after the switch plastic and solder to them a switch of your choosing that will hang outside the phone... You can tell people that it's an antenna that helps with bad reception in your area

The sad thing is, I would have actually done this with my first flip-phone. Heck, my current computer is a collection of loosely-assembled parts kind of haphazardly spread out on a nearby endtable, so I can say I would definitely do this to a phone ; \

Not likely IMO. This was marketed as luxurious device, I don't think they'd do it.

Yes, a luxurious device with a Pentile TFT display, non-removable battery, entirely plastic casing and no dedicated camera button :v
There's no denying that it's a nice phone, but I see a lot of cut corners; what's another one that the majority of users will be fortunate enough to never notice?

 

[LuH]

Fond memories of stripping my Ally down to the digitizer come back to me; everything simply snaps or bolts together and there's nary a drop of glue to be seen :<

I too hate this adhesive hell

I wonder if I can eyeball pictures of a removed plastic bit and use a straightblade bit to simply "drill" through mine to the screws...will have to keep it in mind when I eventually open it up.

I was thinking the same. Don't know what straightblade is, but I wouldn't recommend any blade - the plastic is pretty thick. My plan would be to really cautiously drill it by an actual power drill. There's a bit of space between screws and the plastic piece, so I think it's safe to drill.

Any suggestions on what kind of glue to get? All I have around are hot glue and Gorilla Glue, neither of which strike me as particularly appropriate for this sort of thing.

Double-sided adhesive tape I bought cheap 3mm wide one off eBay, works like charm. Also I thought they say it's 3M as in 3 meters long, but actually got a 3M branded one, possibly 3 meters long

The sad thing is, I would have actually done this with my first flip-phone. Heck, my current computer is a collection of loosely-assembled parts kind of haphazardly spread out on a nearby endtable, so I can say I would definitely do this to a phone ; \

I don't see how it's a bad thing The phone would look badass

Yes, a luxurious device with a Pentile TFT display, non-removable battery, entirely plastic casing and no dedicated camera button :v
There's no denying that it's a nice phone, but I see a lot of cut corners; what's another one that the majority of users will be fortunate enough to never notice?

True...

 

[Septfox]

I was thinking the same. Don't know what straightblade is, but I wouldn't recommend any blade - the plastic is pretty thick.

Sorry, what I was referring to was a flat-edge screwdriver bit, in the same style as one of these for example. A small, sharp one makes a surprisingly good boring tool once you get it started.

Double-sided adhesive tape I bought cheap 3mm wide one off eBay, works like charm. Also I thought they say it's 3M as in 3 meters long, but actually got a 3M branded one, possibly 3 meters long

Ah, double-sided tape. I probably would have gone for rubber cement or somesuch, but this is a much better idea...far less messy.

I don't see how it's a bad thing The phone would look badass

And cats everywhere would instantly be huge fans of it.

 

[LuH]

Sorry, what I was referring to was a flat-edge screwdriver bit, in the same style as one of these for example. A small, sharp one makes a surprisingly good boring tool once you get it started.

That's an interesting idea

Ah, double-sided tape. I probably would have gone for rubber cement or somesuch, but this is a much better idea...far less messy.

I tried it and turns out while it works great for the main body (the first frame that probably wouldn't even need it in the first place), the tape I bought is a disaster for the digitizer. Since there is a pressure contact for the ear speaker being pressed by the adhesive connection only, it gets pressed away all the time. I got to re-assemble it with new tape every like two or three weeks, which is unbearable. Any alternative idea? I don't think we have rubber cement here - tried to google it and it seems it's used only in the US. I don't want to use any solution that's too permanent though - the time may come when I shatter the glass and need to replace it.

Also the display screws may actually be T4 - it seems my T3 and T4 screwdrivers are a tad more thick than they are supposed to be, compared to my brother's bit more expensive set.

 

[Septfox]

I tried it and turns out while it works great for the main body (the first frame that probably wouldn't even need it in the first place), the tape I bought is a disaster for the digitizer. Since there is a pressure contact for the ear speaker being pressed by the adhesive connection only, it gets pressed away all the time. I got to re-assemble it with new tape every like two or three weeks, which is unbearable. Any alternative idea? I don't think we have rubber cement here - tried to google it and it seems it's used only in the US. I don't want to use any solution that's too permanent though - the time may come when I shatter the glass and need to replace it.

Hmm.
I haven't taken mine apart yet - waiting on soldering wick so I can replace the power button with minimal mess - and wasn't planning on stripping it down that far anyway, so all I have to look at is the teardown guide. It looks to me like you could:

1. Press in the screen glass at the top to where it's supposed to be (to align the speaker with the frame as best as possible)
2. Get some sort of thin material to fill in/bridge the gap between the sides of the speaker and the frame
3. Inject a small amount of superglue into the gaps between frame/material/speaker

Finding something to bridge the gaps shouldn't be too difficult, anything will work (the superglue will just soak and make it rock hard anyway), it's only there so there's not enough of a gap for the superglue to shrink and void as it dries.
Just don't use enough glue that it works its way down to the glass, or it'll be a pain to detach later.

Like so (blue: spacer/shim, red: glue):

Alternatively, gluing the speaker directly to the board it interfaces with (using a small shim between them to make room for the contacts)...but the positioning might be trickier to get right.

'course, these both have the problem of being rather permanent...and while I haven't read that there are widespread problems with the ear speaker going out, it does seem to occasionally happen. I just don't really know of any adhesives that are both strong enough to hold without eventually coming apart, and weak enough to be somewhat easily removed if needed : \

Also the display screws may actually be T4 - it seems my T3 and T4 screwdrivers are a tad more thick than they are supposed to be, compared to my brother's bit more expensive set.

I bought a cheap set off ebay that includes T3-T6, so I should be good to go for when I eventually get around to opening the whole thing up (it is certain to happen at some point, if for no other reason than curiosity). At the moment I'm just enjoying customizing SlimKat and playing with the phone; it's so much more able in every way than the old LG I came from, it's ridiculous. Curiosity can, in this case, wait a while~

 

[LuH]

It looks to me like you could:

1. Press in the screen glass at the top to where it's supposed to be (to align the speaker with the frame as best as possible)
2. Get some sort of thin material to fill in/bridge the gap between the sides of the speaker and the frame
3. Inject a small amount of superglue into the gaps between frame/material/speaker

Finding something to bridge the gaps shouldn't be too difficult, anything will work (the superglue will just soak and make it rock hard anyway), it's only there so there's not enough of a gap for the superglue to shrink and void as it dries.
Just don't use enough glue that it works its way down to the glass, or it'll be a pain to detach later.

Like so (blue: spacer/shim, red: glue):
[picture shown in above post]

Alternatively, gluing the speaker directly to the board it interfaces with (using a small shim between them to make room for the contacts)...but the positioning might be trickier to get right.

'course, these both have the problem of being rather permanent...and while I haven't read that there are widespread problems with the ear speaker going out, it does seem to occasionally happen. I just don't really know of any adhesives that are both strong enough to hold without eventually coming apart, and weak enough to be somewhat easily removed if needed : \

Well, I think when I bought the phone in summer 2012 I was like "cool, the only known issue is not showing up in my unit", and almost two years later when earpiece problems started, I was like "****, it finally caught me"...

The idea of hard-fixing the earpiece is nice, I actually thought of it before. I'd love it to be fixed to the PCB, thinking of some non-sticky insulation to be put between the earpiece and the digitizer. It's holding really tight on the digitizer though. I'll see what I can do when I open it up next time - I fixed it this Saturday, so I think it should hold itself somehow at least till the weekend

I was thinking of soldering it to PCB, but was quite scared of messing it up. Super glue is interesting alternative idea But I'm a bit afraid that it will tear the PCB's top layer apart when being pushed away continuously by the pressure contacts. I'll probably first try gluing it to the frame as you indicated in the picture and see then Hope I'll get to send pictures here, although it's a hard thing to do with a phone (my only camera) taken apart...

 

[Septfox]

The idea of hard-fixing the earpiece is nice, I actually thought of it before. I'd love it to be fixed to the PCB, thinking of some non-sticky insulation to be put between the earpiece and the digitizer.

Paper~
alternatively, thinner and clear, plastic/saran wrap. Stick it down in there, then simply tear the little bit out that covers the speaker hole (or probably easier and cleaner, take a craft knife to it).

I was thinking of soldering it to PCB, but was quite scared of messing it up. Super glue is interesting alternative idea But I'm a bit afraid that it will tear the PCB's top layer apart when being pushed away continuously by the pressure contacts.

That's a good point, PCB pads aren't strong at all (found that out while pulling a replacement switch off another phone, which is why I'm waiting on wick; don't want to tear my traces up).
I'd like to propose a combination alternative, then

1. Get some of your double-sided tape, stick a small strip to where the speaker sits on the PCB, try not to get stuck to it
2. Find a pair of lengths of small-gauge wire, an inch apiece should be enough
3. On each side, solder one wire to the copper interface pads
4. Using a small pair of wire snips, snip off the sprung sections of the contacts on the earpiece speaker, leaving enough to solder to
5. Solder the other ends of the wires to the remainder of the contacts on the speaker
6. Carefully align the speaker with the PCB, and stick it to the double-sided tape
7. Finally, tuck the wires out of the way so they don't get pinched and severed when the front assembly is bolted back on

The double-sided tape should be under little to no strain, so it ought to be fine for this task. The digitizer won't be receiving spring pressure from the speaker anymore, so it should stay put. Everything should be oK.

The only potential problems I can think of are that the lack of a seal between digitizer and speaker might reduce the earpiece volume somewhat, and the extra sound movement in the top of the phone casing might have some interesting interactions with the second mic up top.
Of course, this is only if you decide to add something to insulate/destick the digitizer, which actually might not be necessary without the glass being sprung outwards all the time.

It's completely reversible regardless (just need a new speaker and clean up the solder and tape on the PCB), so...might be a better alternative than just straight gluing everything together.

 

[LuH]

So after all I came up with an alternative solution: since I succeeded on fastening the digitizer with two layers of adhesive tape so well it still holds together for over two months now, I just needed to make the contacts hold so I don't lose the earpiece sound when they don't. The contact for pressure pins is actually not on display's PCB, but on a T-shaped strip of metal, attached to the display, so I just bent the arms in and it works like charm since

 

[Septfox]

Heh, two layers.

Glad to hear you got it worked out. Now I know what to do in the (hopefully unlikely) event that I ever have this issue.

For my end of things, my adventures in power button repair have unfortunately met a disappointing end; the power button completely quit working for normal functions shortly after my last post. The tools I ordered came in, I opened up the phone and tried shorting the leads on the button, to make sure it was indeed the button that was bad. Nothing, nada, no response. I then performed some exploratory surgery on the button (as I have a suitable replacement sitting here), and found it to be of a somewhat simple, rugged design (typical metal-dome design, center pops down to make contact, sides/pins 1 and 3 are common). No manufacturing faults evident.

Working theory is that somewhere in the circuit that it completes, there is a defect. A component that overheated each time the button was used until the point of complete failure, perhaps. Curiously, the button (or rather the pads, no more button at this point) can still be used in combination with Volume - to reset the device. It just...won't respond to normal short/longpresses. I'd imagine there's another trace that splits off before the defective component, leading to the Volume - button and creating a sort of hardware AND condition that triggers a reboot.

Don't know. Don't have the knowledge, nor the equipment, to really diagnose it properly, let alone affect repairs. Guess I'm stuck with popping the keyboard open to wake it until the glorious day that the Droid 5 comes around~