[GUIDE] Where's my CPU ID at, why you need adb and whats fastboot!!

psycho_somatic · Nov 11, 2012

2 hours and i finally got my tablet working again .... thanks very much

one thing i think should be pointed out though is (4) From a uid.txt in any Honeycomb-cwm backup in external_sd/clockworkmod/backup/"your_HC_backup" folder

that uid.txt format from the backup is 0x037c620441dfb197 and it should be pointed out that you remove 0x0 bit for a CPUID code of 37c620441dfb197 just a little thing that would have saved me some time...

dbaps · Nov 11, 2012

Thank You

For some reason I could never get the Acer Recovery tool to allow me to install an image. The option was always greyed out, even after I installed Busybox several times. I also tried Busybox Pro and still no luck. I kept flashing thinking I was doing the install wrong but could never get it to work.

THANK YOU!!! Even though this was challenging for a newbie like me, your instructions made it a lot easier. This was the one URL that really helped me. Donation coming!!! The only issue I had was having to manually turn on the power.

Paul

dibb_nz · Nov 12, 2012

psycho_somatic said:
2 hours and i finally got my tablet working again .... thanks very much

one thing i think should be pointed out though is (4) From a uid.txt in any Honeycomb-cwm backup in external_sd/clockworkmod/backup/"your_HC_backup" folder

that uid.txt format from the backup is 0x037c620441dfb197 and it should be pointed out that you remove 0x0 bit for a CPUID code of 37c620441dfb197 just a little thing that would have saved me some time...

OK will be sure to make that a bit clearer...glad things worked out for u

Sent from my GT-I9300 using Tapatalk 2

dibb_nz · Nov 12, 2012

dbaps said:
For some reason I could never get the Acer Recovery tool to allow me to install an image. The option was always greyed out, even after I installed Busybox several times. I also tried Busybox Pro and still no luck. I kept flashing thinking I was doing the install wrong but could never get it to work.

THANK YOU!!! Even though this was challenging for a newbie like me, your instructions made it a lot easier. This was the one URL that really helped me. Donation coming!!! The only issue I had was having to manually turn on the power.

Paul

thanks

re: Acer recovery installer....not sure why this is....once u have the unlocked bootloader it should work fine, wot rom u on, not that that should make any difference....anyway its just as easy to fastboot a recovery these days....u have other worries feel free to ask
rgds dibb

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samaliset · Nov 13, 2012

Still bricked

Hello dear,

I see that some of were luckt to get back their A500 to work which is not my case yet.
This is my friend device, he was playing a stream on it and suddenly went black. Since few days I was trying to help him (I had an the same device and some sort of same prob before) but could not succeed.
I used USDeview to verify if the device can be connected to my Windows XP system. I found 4 lines corresponding to Acer A500 2 of them had SN like that:
37c6185425f3197
37c618642008097
I used both of them respectivly to get the SBK which had been done successfuly.
I used several tools hopping that I would unbrick the device, such as: Afterota v1_01, A500Manager, DotNetDetecter, A500APXFlash, A500APXFlashBundle Builder, but non of them could help. As if it appears the Device is not connected.
I don't where to go from here and I realy need a hand.
Many thanks

dibb_nz · Nov 13, 2012

samaliset said:
Hello dear,

I see that some of were luckt to get back their A500 to work which is not my case yet.
This is my friend device, he was playing a stream on it and suddenly went black. Since few days I was trying to help him (I had an the same device and some sort of same prob before) but could not succeed.
I used USDeview to verify if the device can be connected to my Windows XP system. I found 4 lines corresponding to Acer A500 2 of them had SN like that:
37c6185425f3197
37c618642008097
I used both of them respectivly to get the SBK which had been done successfuly.
I used several tools hopping that I would unbrick the device, such as: Afterota v1_01, A500Manager, DotNetDetecter, A500APXFlash, A500APXFlashBundle Builder, but non of them could help. As if it appears the Device is not connected.
I don't where to go from here and I realy need a hand.
Many thanks

Of the tools are saying this then usually the drivers are at fault....did u install both sets of drivers as the guide stated?

Dotnetdetecter..exe, can u enter yr cpuid with this, does the tab enter 'acer download mode '
do u have an apx device listed in hardware and printers? ?
Is the acer Picasso driver showing in 'safely remove hardware?
These are all driver issues,reinstall them.

U say the tab screen is black,is the power light on too?
Can u boot the tab,?
If this is the case then you're stuck in apx mode which is near impossible to recover from and if it's hardware related it will require a new motherboard.....

Sent from my GT-I9300 using xda premium

samaliset · Nov 13, 2012

dibb_nz said:
Of the tools are saying this then usually the drivers are at fault....did u install both sets of drivers as the guide stated?

Dotnetdetecter..exe, can u enter yr cpuid with this, does the tab enter 'acer download mode '
do u have an apx device listed in hardware and printers? ?
Is the acer Picasso driver showing in 'safely remove hardware?
These are all driver issues,reinstall them.

U say the tab screen is black,is the power light on too?
Can u boot the tab,?
If this is the case then you're stuck in apx mode which is near impossible to recover from and if it's hardware related it will require a new motherboard.....
Sent from my GT-I9300 using xda premium

Thank you for your help.
I'll try to answer your questions as follow:

did u install both sets of drivers as the guide stated? = Yes I think
Dotnetdetecter..exe, can u enter yr cpuid with this, does the tab enter 'acer download mode ' = It gets stuck at about 10% progress
do u have an apx device listed in hardware and printers? ? = How can I get that and from
Is the acer Picasso driver showing in 'safely remove hardware? = how to check
These are all driver issues,reinstall them. = do you mean USB drivers = yes

U say the tab screen is black,is the power light on too? = I can switch the Tab on/off but I have the message "Boot verified failed" but when I use the Reset + Power the screen goes black and the power light is on
Can u boot the tab,? = yes, but always I get the message "Boot verified failed" with the big ACER logo in the middle.

I hope you can give me some guide (knowing I am not expert) please.
Thanks again

I just performed further tests and I get some answers.
- Dotnetdetecter, it gives me a message that the Tab is not connected.
- I found out the Hardware /Printer, when checking the USB devices, click right I get the Windows device with APX icon at the 3rd raw.

dibb_nz · Nov 14, 2012

samaliset said:
Thank you for your help.
I'll try to answer your questions as follow:

did u install both sets of drivers as the guide stated? = Yes I think
Dotnetdetecter..exe, can u enter yr cpuid with this, does the tab enter 'acer download mode ' = It gets stuck at about 10% progress
do u have an apx device listed in hardware and printers? ? = How can I get that and from
Is the acer Picasso driver showing in 'safely remove hardware? = how to check
These are all driver issues,reinstall them. = do you mean USB drivers = yes

U say the tab screen is black,is the power light on too? = I can switch the Tab on/off but I have the message "Boot verified failed" but when I use the Reset + Power the screen goes black and the power light is on
Can u boot the tab,? = yes, but always I get the message "Boot verified failed" with the big ACER logo in the middle.

I hope you can give me some guide (knowing I am not expert) please.
Thanks again

I just performed further tests and I get some answers.
- Dotnetdetecter, it gives me a message that the Tab is not connected.
- I found out the Hardware /Printer, when checking the USB devices, click right I get the Windows device with APX icon at the 3rd raw.

ok...theres alot going on here but first of all. if the flash fails with the apx device listed then I'm not sure if we can get your tab up and running....

if dotnetdetector says your tab is not connected this is definitely a driver issue....you need both Acer and android sdk drivers. there is a zip in the bottom of the Original Post adb_fast.zip - did you install these??? There is no point going any further until you get the dotnet to recognise the tab....

If you did, then UNINSTALL them, reboot - attach your micro usb cable to your pc - and windows should install them again.

if everything is good up to this point, then...

Disconnect the cable,
(with your tab OFF) run dotnetdetector:
do not connect the micro usb cable!!!

Wait for the EUU to "scan for newer image" - this will take a good 10 mins -
a window will pop up saying it cannot detect your tab and give you instructions for "manual apx mode",
please go ahead and use the buttons to enter apx mode....hopefully the tab will vibrate to let u know its in apx.....
the screen should be black and the power led light is on....

Now, connect the tab to the pc with your micro usb cable....
open device manager on your PC - look under "USB Controllers" you should see the acer boot recovery driver or something acer related listed here...if not then you need to reinstall the drivers again....you might have to go thru this 3-4 times!!!!

Ok the next thing to check is that your tab has entered "acer download mode" and then continue with the EUU flash....

Be aware your tabs problem will NOT be easy to fix, u may have to go thru this 8 or 9 times until something finally works.....

If the dotnetdetector (EUU) method just will not work we can try a manual nvFlash method...

OH, a 'real' hard reset often can work miracles!!!! Here's how:

Try using hard reset:

1) Turn off your tablet,

2) Rotation lock to your left;

3) Press Vol+ (closest to rotation lock) and power on simultaneously

4) As soon as the tablet vibrates you can release the power on button and you should start to switch rotation lock left and right till you see

Erasing Userdata...
Erasing Cache...
Vol+ is still pressed;

5) The tablet starts to format
6) Your tablet will be as clean as it can be.

U need to see on the tab display
"Erasing Userdata...
Erasing Cache... if you don't see these words can you tell me what does happen...

I would try this first and then run dotnetdetector!!

I hope you understand all of this, just ask if anything is not clear to you...good luck
dibb

samaliset · Nov 14, 2012

dibb_nz said:
ok...theres alot going on here but first of all. if the flash fails with the apx device listed then I'm not sure if we can get your tab up and running....

if dotnetdetector says your tab is not connected this is definitely a driver issue....you need both Acer and android sdk drivers. there is a zip in the bottom of the Original Post adb_fast.zip - did you install these??? There is no point going any further until you get the dotnet to recognise the tab....

If you did, then UNINSTALL them, reboot - attach your micro usb cable to your pc - and windows should install them again.

if everything is good up to this point, then...

Disconnect the cable,
(with your tab OFF) run dotnetdetector:
do not connect the micro usb cable!!!

Wait for the EUU to "scan for newer image" - this will take a good 10 mins -
a window will pop up saying it cannot detect your tab and give you instructions for "manual apx mode",
please go ahead and use the buttons to enter apx mode....hopefully the tab will vibrate to let u know its in apx.....
the screen should be black and the power led light is on....

Now, connect the tab to the pc with your micro usb cable....
open device manager on your PC - look under "USB Controllers" you should see the acer boot recovery driver or something acer related listed here...if not then you need to reinstall the drivers again....you might have to go thru this 3-4 times!!!!

Ok the next thing to check is that your tab has entered "acer download mode" and then continue with the EUU flash....

Be aware your tabs problem will NOT be easy to fix, u may have to go thru this 8 or 9 times until something finally works.....

If the dotnetdetector (EUU) method just will not work we can try a manual nvFlash method...

OH, a 'real' hard reset often can work miracles!!!! Here's how:

Try using hard reset:

1) Turn off your tablet,

2) Rotation lock to your left;

3) Press Vol+ (closest to rotation lock) and power on simultaneously

4) As soon as the tablet vibrates you can release the power on button and you should start to switch rotation lock left and right till you see

Erasing Userdata...
Erasing Cache...
Vol+ is still pressed;

5) The tablet starts to format
6) Your tablet will be as clean as it can be.

U need to see on the tab display
"Erasing Userdata...
Erasing Cache... if you don't see these words can you tell me what does happen...

I would try this first and then run dotnetdetector!!

I hope you understand all of this, just ask if anything is not clear to you...good luck
dibb

Good morning dibb,
Oh great and patient you are. I'll follow strictly your recommendations, which I did understand well and I'll let you know with all my thanks.

Edit. I started your point (3) several times and at (now) the Tab is standing on the following message :
"Bootloader v0.3.12-ics: starting Fastboot USB download prrotocol"
I connected the tab to my PC and happily the it displayed the message "New device is now connected". Is this good news for me?
Where I shall go from there?
Thanks again for your help

Re-Edit: I couldn't wait, I tried "dotnetdetector" which keep saying, your tab is not connected, and tried too "A500APXFlash" and did not succeed neither.,

A lttle update if that can help:
- With the paper-clip and power (3) seconds, I could put the Tav into boot-recovery (added in the PC Device Manager after connection).
- In the USBDeview, there is are several lines only one line (Acer Picasso USB Boot-recovery driver), shows Connected, but it doesn't have Serial Nbre, it has an Instance ID: (USB\Vid_0955&Pid_7820\5&e50db94&0&4).
- The "dotnetdetector" utility runs a while then it asks to connect the USB cable. After that there is a rectangle, I suppose that needs to be filled. I put the Tab UID (I am not sure it is the right one, becouse the progress goes for ever.

Any one out there I really need helps....

Last update:
Just to inform you that I finally succeeded to recover the Tab with a bacup.zip ROm found some where here on the forum.

Anyway, many thanks for the help.

ameer1234567890 · Jan 13, 2013

When I try "cat /sys/firmware/fuse/acer_cpuid" at Terminal Emulator, the tab freezes? Any idea why?

dibb_nz · Jan 13, 2013

ameer1234567890 said:
When I try "cat /sys/firmware/fuse/acer_cpuid" at Terminal Emulator, the tab freezes? Any idea why?

I've always used a file explorer to navigate there..
Using terminal u should find it by running one of the dmesg commands after a reboot

Mlopik · Jan 13, 2013

I have problem..

I used this guide. I have rooted Iconia a500 (via this), SDK USB Drivers, Acer USB Drivers. And I can't connect to APX Mode. Screen goes off, but no LED...

Please help me!

:crying:

dibb_nz · Jan 18, 2013

sorry, ive only just seen yr post....have u got sorted yet?

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Cpt_Chaos · Jun 14, 2013

Thanks for the tip to find my CPU ID

I just wanted to shout out a thanks for the tip (2) Retrieve your CPUID from your Tab using Terminal Emulator from the market

It worked like a charm. And when combine with the following thread, http://xdaforums.com/showthread.php?t=1810618, I now have my CPUID and SDK.

Thanks!!!!!

BinaryEclipse · Jun 21, 2013

Hey, I've been trying to get a custom rom on my a500. I've been having difficulties getting past the beggining stuff - flashing the bootloader. The tab is currently on 4.0.3, and I'm sure I got the drivers I needed to get, but in APX mode, nothing comes up in my system tray. When getting the drivers from the Acer site, I noticed nothing under the ICS version - I wasn't sure if that was important or not, but that got me thinking that maybe I have to downgrade to HC first? Does flashing the bootloader not work from ICS stock? or am I trying the wrong bootloaders? (I've tried the V8 blue and green, V7, and V6 from http://skrilax.droid-developers.org/a500/nvflash/images/ )

dibb_nz · Jun 21, 2013

BinaryEclipse said:
Hey, I've been trying to get a custom rom on my a500. I've been having difficulties getting past the beggining stuff - flashing the bootloader. The tab is currently on 4.0.3, and I'm sure I got the drivers I needed to get, but in APX mode, nothing comes up in my system tray. When

There are two sets of drivers needed
This from the OP:
Acer Support for Acer APX/Fastboot/Recovery Drivers
Android SDK for the adb/USB drivers - You can d/l a mini zip containing just the adb and fastboot drivers attached to this post] "adb_fast.zip"

Try another micro USB cable too
No you should not need to downgrade....
Just be sure to follow ALL the steps in the specified order and you should be good

dibb

aDigitalPhantom · Jul 27, 2013

I am wondering if the uid is the same as the cpuid? i ask because when my n7's battery went flat, and i charged the battery via usb2battery there was a uid sticker under the back cover.

edit: someone linked me here from the n7 forum and i did not notice it.....

dwind · Sep 21, 2013

Major thanks to the xda brethren. Especially dibb_nz, Vache, Jasto, Civato, Scrilax,eppeP, blacthund3r, Moscow Desire, and Timmydeans. I have snatched another A500 out of the jaws of despair. It looked like the tab had a motherboard failure, but before I gave up I just hunkered down, read some more and hit it with all the tools and techniques from the techiens here. Finally raised the tab back to HC this morning. I was getting the can't read Sdcard error but then was getting funky reads on the internal memory as well. Thanks again folks. Want to also shout out JazzyJ and Srbeen. It takes a village to raise a unruly A500

dibb_nz · Sep 21, 2013

dwind said:
Major thanks to the xda brethren. Especially dibb_nz, Vache, Jasto, Civato, Scrilax,eppeP, blacthund3r, Moscow Desire, and Timmydeans. I have snatched another A500 out of the jaws of despair. It looked like the tab had a motherboard failure, but before I gave up I just hunkered down, read some more and hit it with all the tools and techniques from the techiens here. Finally raised the tab back to HC this morning. I was getting the can't read Sdcard error but then was getting funky reads on the internal memory as well. Thanks again folks. Want to also shout out JazzyJ and Srbeen. It takes a village to raise a unruly A500

Wow thanx

Pleased it all worked for u. I am no techie or dev just a normal user with lottsa 'experience' unbricking lol...but yes this is a fantastically helpful community and comments like yours make it all worthwhile

regards dibb

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