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Dock not charging, tablet does (also through dock)

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By dagrim1, Senior Member on 24th March 2014, 11:00 PM
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This has been going on for a while and hasnt bothered me too much, until now!

The thing is my dock hasn't been charging for quite a while, battery is stuck at 0%. The light is blinking orange when the tablet is docked in and/or the charger is connected. The tablet itself charges just fine, also through the dock.

I have already opened the dock, nothing strange. Battery appears fine (not swolen or anything) and nothing weird with the connection. I have been flipping the SW1001 swithc like crazy as well (even though by now I don;t remember the default anymore, open or closed... or what open or closed actually is. Even though on the backside of the PCB there is some 'open' print).

I have tried charging the dock (both seperately as with tablet docked in) with switch in both connections (for quite a few hours) but without luck. The led is blinking the same way, no matter how I put the switch.

Also tried flashing stock firmware again, no luck.

* Is there a way to test the dock battery? (Apart from switching the dock and tablet battery for example).

* Does anyone know what the default posittion of the SW1001 swithc is? (This is the switch on the right side of the left pcb inside the keyboard dock).

* Any other tricks getting the dock battery to charge again?

I have been thinking of ordering a new battery (or possibly entire dock, might be able to get one second handed) but would really like to have tried everything else first
 
 
25th March 2014, 12:57 AM |#2  
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To test the dock battery (or any battery), use a multimeter, find out what the voltage should be (I believe but don't hold me to it) that the dock and internal battery should be ~15v. Check on the internet (google, youtube, etc) for correct usage of a multimeter. If the battery is fine, you already have the multimeter in front of you, check the connections to the tablet from the battery.

If you don't know where to get a multimeter, (you probably shouldn't have opened the dock) you can get one at RadioShack, Home Depot, Lowes, Menards, Frys, decent gas stations, the internet. You get the idea: they're everywhere.
25th March 2014, 10:22 AM |#3  
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Quote:
Originally Posted by da3dsoul

To test the dock battery (or any battery), use a multimeter, find out what the voltage should be (I believe but don't hold me to it) that the dock and internal battery should be ~15v. Check on the internet (google, youtube, etc) for correct usage of a multimeter. If the battery is fine, you already have the multimeter in front of you, check the connections to the tablet from the battery.

If you don't know where to get a multimeter, (you probably shouldn't have opened the dock) you can get one at RadioShack, Home Depot, Lowes, Menards, Frys, decent gas stations, the internet. You get the idea: they're everywhere.

Cheers, I do have a multimeter so will indeed give that a try.

Not sure how to actually measure this battery:


but I'll see if I can find anything.

Also, perhaps I'll try swapping the battery from the tablet and dock as well anyway. Hard to tell if the battery is at fault or some other part (charging the battery).
25th March 2014, 12:03 PM |#4  
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As a last resort, because these batteries often won't charge up again if they drop to 0% would be to (safely) warm it up, might give it that 1% needed to kick start it

Used to put my pencil batteries on the hot radiator for an hour when they had run out, and normally got a little longer out of them until they cooled down

Not sure if that works with Li-Ion but wouldn't hurt

Ive had the 0% dead battery problem with the dock, but swapping between SW1001 switch positions every half hour eventually got it charging again
25th March 2014, 02:46 PM |#5  
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Quote:
Originally Posted by *Detection*

As a last resort, because these batteries often won't charge up again if they drop to 0% would be to (safely) warm it up, might give it that 1% needed to kick start it

Used to put my pencil batteries on the hot radiator for an hour when they had run out, and normally got a little longer out of them until they cooled down

Not sure if that works with Li-Ion but wouldn't hurt

Ive had the 0% dead battery problem with the dock, but swapping between SW1001 switch positions every half hour eventually got it charging again

Thanks for the tip, nice alternative for the 'putting it in the fridge' one, will certainly give that a try too. I actually closed the dock again, but guess I'll be popping it open again this evening hehe.

Do you happen to remember/recall what the proper position of the SW1001 switch was?
25th March 2014, 04:28 PM |#6  
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Hmmm...thanks Asus, that makes everything easier....Usually red and black are +/-, there appears to be text on the battery cables. Check to see if any have + out, - out, + discharge, etc, etc. You want to see if it will output any current, because if it does, it is not really 0%, just really low. If you find which ones are charging inputs, give it a (small) jolt of like 0.25v - 0.5v higher than what it asks for a couple minutes and then switch back to normal.
25th March 2014, 04:52 PM |#7  
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Quote:
Originally Posted by dagrim1

Thanks for the tip, nice alternative for the 'putting it in the fridge' one, will certainly give that a try too. I actually closed the dock again, but guess I'll be popping it open again this evening hehe.

Do you happen to remember/recall what the proper position of the SW1001 switch was?

I can do one better - just remembered Id seen this a while back

http://www.instructables.com/id/How-...Keyb/?ALLSTEPS


25th March 2014, 05:20 PM |#8  
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Great, cheers guys!

Guess I'll have some playing to do. (Hell, it's prolly easier to just shell 30 bucks for a new battery but it's a matter of principle now )
25th March 2014, 05:51 PM |#9  
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lol yea, good luck - it's a pain because the actual battery is likely still fine, they just refuse to charge if completely drained, but, Ive managed it before and so have others, so you have some hope
25th March 2014, 11:36 PM |#10  
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Haha, thanks Ah well, I do enjoy tinkering around with this stuff (but I'm also clumsy at times, accidently pulling out cables and/or ribbons ).

Multimeter didn't work btw, couldn't manage to get a reading (hard to make contact with any of the wires of the battery, as well as no clue which wires do what... couldn't really read the text). Did manage to connect the tablet battery with the dock connector, immediately got a green light instead of constantly blinking orange/amber one. Attaching the dock battery to the tablet only resulted in a boot if I connected the charger... Resulted in a 0% battery and message "please connect the charger" so yeah, seems the battery is indeed the issue.

Either indeed depleted to 0% or perhaps the wiring is broken. Anyway, the battery is in the freezer now and am going to take it out tomorrow. If that doesn't work, I'll put it on the radiator in order to heat it up a bit (or perhaps a blowdryer on a low setting, will see). If that also doesn't work I guess I'll have to order a new battery afterall (might as well to round things up).

Of course now I also noticed I only get sound from one speaker Hell, and to consider we don;t even use this tablet anymore haha.
26th March 2014, 08:35 AM |#11  
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Never heard of putting batteries in the freezer, putting the charger in the freezer works only because it resets the thermal cut out switch, but not heard it about the actual batteries

For storing them when not in use, Ive heard you charge them to 50% and seal them in an airtight zip bag and store in the fridge for maximum lifespan

Make sure you let it thaw out back to room temp before putting it on the radiator though or you'll end up with condensation inside of it

Don't know about the wire colours either unfortunately

Fun project anyway, keeps you out of mischief

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