Something very strange happened yesterday.
I got the latest OTA and installed it, after this the touch screen is not responding at all.
I managed to control the tablet with an usb mouse, so I have been able to do a factory reset, but to no avail.
Just now I'm clueless on what to do.
I actually did on more thing in the same process; the initial reason for why I took up the tablet yesterday, was to put on a screen protector film.
So while it was updating I put on the screen protector, after all this was done the touch screen was not responding. I don't think this issue has nothing to do with the screen protector, and I have also now removed the film. But still the screen does not react to touch.
But what to do from here?
Is it possible to revert to a previous version of the firmware?
I doubt reversion is the best option.
If this was common this forum would be flooded with complaints.
It might have been something to do with putting on the screen protector DURING an update.
Factory reset may help. Did you try the pinhole reset switch?
Sent from my HTC One X using Tapatalk 2
I can use the tablet with a usb mouse, and have been able to do a factory reset. But this did not difference.
I have also tried the pinhole reset, no luck...
I have the same issue.
I tried back to ICS stock rom. Touch screen is not responding too. :crying:
imtheyoyo said:
I have the same issue.
I tried back to ICS stock rom. Touch screen is not responding too. :crying:
Click to expand...
Click to collapse
Interesting.
Was it after the latest OTA the touch screen stopped working? Or was it something else that started this?
My tablet is stock in every way, never been rooted or had other roms installed.
I could of course send it in to service, but since I bought the tablet while on holiday in Washington DC and I reside in Norway, it's a little unpractical.
owangen said:
Interesting.
Was it after the latest OTA the touch screen stopped working? Or was it something else that started this?
My tablet is stock in every way, never been rooted or had other roms installed.
I could of course send it in to service, but since I bought the tablet while on holiday in Washington DC and I reside in Norway, it's a little unpractical.
Click to expand...
Click to collapse
what is your image version and touch FW version? my A700 touch function is normal after OTA update.
my image is Acer_AV051_A700_RV19RC01_TWN_GEN1
touch FW version:AT0-22F40-F6935B
My touch screen work again.
I back to ICS stock rom (Acer_AV043_A700_RV07RC06_EMEA_FR), then I apply the update (Acer_A700_AV043.RV07RC06_AV043.RV23RC04_EMEA_FR).
Now I'm on JB (Acer_A700_AV043.RV23RC04_AV051.RV10RC01_EMEA_FR). All Work fine.
jacksonkuo said:
what is your image version and touch FW version? my A700 touch function is normal after OTA update.
my image is Acer_AV051_A700_RV19RC01_TWN_GEN1
touch FW version:AT0-22F40-F6935B
Click to expand...
Click to collapse
Thanks. Compared to yours I see that there is some problem with my touch FW version. On my tablet it says AT0-0-0.
Image version reads Acer_AV051_A700_1.052.00_PA_CUS1
Is it a way for me to fix this? Could I perhaps reapply some of the patches?
Sent from my U8860 using Tapatalk 2
owangen said:
Thanks. Compared to yours I see that there is some problem with my touch FW version. On my tablet it says AT0-0-0.
Image version reads Acer_AV051_A700_1.052.00_PA_CUS1
Is it a way for me to fix this? Could I perhaps reapply some of the patches?
Sent from my U8860 using Tapatalk 2
Click to expand...
Click to collapse
Seems the touch FW is incorrect.Maybe you can download the OS upgrade image from Acer website and reflash OS. I checked the image and it should packed touch FW. If still failed, maybe contact Acer service is good way to solve your problem.
Good luck.
I had the same problem this week, bought the Tablet on monday, made the OTA Update and boom, no Touch input.
I resolved it by unlock my device, flash CWM and then flashed a older full rom.
After that i made the OTA Update again and this time it worked well.
I can upload the ROM i used for this if it's needed.
MfG Frank
via Acer Iconia Tab A700 mit Tapatalk 2.0
Thanks. I have fixed my tablet now.
I managed to reflash an older rom, taken from Acer site. And then upgraded via ota to the latest version.
I did not need to use cwm. Just started the tablet the power + volume - combination
Sent from my A700 using Tapatalk 2
Problem: Screen touches are bugged..
Hi,
I need some urgent help..
I upgraded my A700 (was shipped with 4.0.4) to JB but the screen touches are completely off track. I did the following:
1) unlocked the bootloader
2) flashed CWM Rom 6.0.1.5
3) installed cm-10
Don't know what to do next..
I have an Acer A700 and I'm having the same problem as others here.
Once I upgarded my ROM, the A700 touch-screen did not work.
I found a post that explained a fix. Here's what I did:
* Flashed the non-touch CWM v6.0.1.5
* Wiped everything (system, data, cache, dalvik)
* Installed the IconiaN ROM (by Vorbeth) and choose the option to have IconiaN upgrade my "Touch Firmware"
* The A700 is now booting with version JB-653b3d3 (Unlocked)
* The ROM loads just fine
However, in the ROM, the touchscreen does not work. Clicking in one place on the screen will trigger a click in an entirely different area of the screen.
I then tried installing one of the stock Acer ROMs from their website through CWM. None of them would load, not sure why?
Other people here seem to have solved the problem by flashing an "older ROM" from Acer. I could not find any trace of this older ROM.
I'm running an American version (PA1_CUS) if that makes any difference? I've also tried installing CM 10.1 with the same problems in the touchscreen.
Thank you in advance for any suggestions!
RKM
Where can i get the acer software to update? i've tried to find it on the acer website but i cant find it.
please help. i just got the device and i updated it and now a portion of the screen becomes unresponsive to touch input.
toggling the screen on and off will fix it temporarily but that only lasts for 5 minutes max before it stops being responsive again.
Every thing on it is stock so i want to keep it that way
pyrochance said:
Where can i get the acer software to update? i've tried to find it on the acer website but i cant find it.
please help. i just got the device and i updated it and now a portion of the screen becomes unresponsive to touch input.
toggling the screen on and off will fix it temporarily but that only lasts for 5 minutes max before it stops being responsive again.
Every thing on it is stock so i want to keep it that way
Click to expand...
Click to collapse
Try Google and search for your Rom Build number. Should be able to find the update file. You can also try some of the Acer support sites. I remember they have some ICS full roms for the 700.
Next of course, you're going to ask how to install it?
1. Decrypt the original update file (tool is in the themes and apps forum)
2. Using 7zip, OPEN the decrypted file (DO NOT UNZIP IT)
3. Pull the "update.zip" (NO NOT UNZIP IT)
4. Copy the update.zip to your ext sd card
5. Start tablet holding PWR & Vol- or + (can't remember which) until you see the text in upper left corner then release. Now, JB may have a different stock recovery which offers a small menu. I believe you can select the install update from there.
If the update doesn't install, it may be the wrong update file, so you'll have to search for another.
Anyhow, should work for you. But you may have to roll back to the original ICS rom (full version) then OTA update again.
Remember though, you do this at your own risk, so if things get messed up, don't blame anybody
Moscow Desire said:
Try Google and search for your Rom Build number. Should be able to find the update file. You can also try some of the Acer support sites. I remember they have some ICS full roms for the 700.
Next of course, you're going to ask how to install it?
1. Decrypt the original update file (tool is in the themes and apps forum)
2. Using 7zip, OPEN the decrypted file (DO NOT UNZIP IT)
3. Pull the "update.zip" (NO NOT UNZIP IT)
4. Copy the update.zip to your ext sd card
5. Start tablet holding PWR & Vol- or + (can't remember which) until you see the text in upper left corner then release. Now, JB may have a different stock recovery which offers a small menu. I believe you can select the install update from there.
If the update doesn't install, it may be the wrong update file, so you'll have to search for another.
Anyhow, should work for you. But you may have to roll back to the original ICS rom (full version) then OTA update again.
Remember though, you do this at your own risk, so if things get messed up, don't blame anybody
Click to expand...
Click to collapse
Thank you for the detailed help!
after many google searches i finally found the update files on the acer website!
i managed to go back to ics then re update to jb
and for a while my screen had no issues but they came back again. Im begining to think that its a hardware related issue because it comes and goes. I am going to see if my warranty with square trade will get it fixed.
Related
I software OTA update from system and now can't reboot system now. Any one please help me?
Now my eee pad screen is recovery mode showing. Can't reboot system....HELP.....
I am having the same problem. I have tried multiple work arounds' with no luck. Any help would be appreciated.
Ok, just select reboot and press both volume up and down, and keep them in...
A new screen will appear from where the Transformer will boot into Android.
I'm having this exact same issue, quit annoying this is
I've already tried a dozen times to change the clockwork recovery to a newer version but the old crappy one sems to be not willing to make room for the newer touch version.
ps In Rom manager I see the correct version of the cloackwork recovery as being installed but once going into the real recovery it is the old one
Alternative way to result
I installed custom ROM (Android revolution HD) from SD card.
Now it's Ok....This ROM is rooted and fastest..
http://forum.xda-developers.com/showthread.php?t=1245892
ROM manager doesn't work well for the tf, just don't use it in general Dx
minnaing - Good choice of ROM Glad it could be resolved, that was the first thing I was going to suggest to do.
hi, i just got my tablet back from repairs and i asked them to install ICS if they had to reset the firmware, and they did. now my problem is that i want to update to the 4.2 JB that came out (while my ASUS was in repairs for 3 WEEKS) but i can't. when i try to update, it just says "no update found". i have already talked to their "experts" and he just kept saying "oh, it come to your tablet when it ready" I have also tried to download the update from their site, but then when it tells you what version you need by looking at the build number, i noticed mine was IML74K.WW_epad-9.4..... and shouldn't it be something more like US_epad-9.4.....? i tried to install it anyways but it never detected it on the sd card. so then i tried to just use fastboot and flash it to the device, but when i entered the boot menu, THERE WAS NO OPTION!! In fact, there was only 2 options, wipe data, and boot android. there was no usb or RCK (or whatever it was) option. i also have several other problems, but i'll leave them for another day and another post, sense they may be related
Any help would be awesome sense it's obvious I'm not going to get much help from ASUS. Let me know if you need any other info too!
Thanks in advanced!!
Jake
Snakester15 said:
hi, i just got my tablet back from repairs and i asked them to install ICS if they had to reset the firmware, and they did. now my problem is that i want to update to the 4.2 JB that came out (while my ASUS was in repairs for 3 WEEKS) but i can't. when i try to update, it just says "no update found". i have already talked to their "experts" and he just kept saying "oh, it come to your tablet when it ready" I have also tried to download the update from their site, but then when it tells you what version you need by looking at the build number, i noticed mine was IML74K.WW_epad-9.4..... and shouldn't it be something more like US_epad-9.4.....? i tried to install it anyways but it never detected it on the sd card. so then i tried to just use fastboot and flash it to the device, but when i entered the boot menu, THERE WAS NO OPTION!! In fact, there was only 2 options, wipe data, and boot android. there was no usb or RCK (or whatever it was) option. i also have several other problems, but i'll leave them for another day and another post, sense they may be related
Any help would be awesome sense it's obvious I'm not going to get much help from ASUS. Let me know if you need any other info too!
Thanks in advanced!!
Jake
Click to expand...
Click to collapse
The stock 4.2 (10.6.1.8) has an assert that will only allow it to be installed from 10.4.2.20. If memory serves me correctly ICS does not have the usb icon until unlocked. Also the new 4.2 bootloader only has three icons - no usb.
Are you unlocked? Most units that come from repair are not and can't be unlocked.
With all the unresolved issues on 4.2 I would not put it on my tablet at this time. There are many bricks waiting for a resolution.
thanks, that helped fix it!
tobdaryl said:
The stock 4.2 (10.6.1.8) has an assert that will only allow it to be installed from 10.4.2.20. If memory serves me correctly ICS does not have the usb icon until unlocked. Also the new 4.2 bootloader only has three icons - no usb.
Are you unlocked? Most units that come from repair are not and can't be unlocked.
With all the unresolved issues on 4.2 I would not put it on my tablet at this time. There are many bricks waiting for a resolution.
Click to expand...
Click to collapse
I downloaded the 4.1 firmware and it detected it and installed it right away. I don't know why they couldn't tell me that when I called, but it fixed the problem. And I know you said not to, but I installed 4.2 anyways because I was too curious, and I have personally found no problems and like the new features.
Hello. i want to ask if someone have Clockwork mod or some custom firmware on Prestigio PMP5670c Android 4.1.1.
I managed to root it, but i realy dont like this Android version and Prestigio is not intrested in upgrading.
Hey can someone make a recovery for this tablet.
Sent from my PMP5670C_DUO using xda premium
Shawes said:
Hello. i want to ask if someone have Clockwork mod or some custom firmware on Prestigio PMP5670c Android 4.1.1.
I managed to root it, but i realy dont like this Android version and Prestigio is not intrested in upgrading.
Click to expand...
Click to collapse
I started to do some work on that tabled, but stuck with kernel touchscreen configuration. See here.
Touch chip is Goodix GT911, screen size is 800x1280 px. I managed to get touch working but partialls. First aprox 1.2 inches of top of screen are not responsive to to touches. After that 1.5" touch works normally.
I'm pretty sure I'm sending wrong configuration data array to chip and thats why its not working as it should, but have no time at the moment to toy with it. If anyone experienced with Goodix chips, pm me with ideas...
stane1983 said:
I started to do some work on that tabled, but stuck with kernel touchscreen configuration. See here.
Touch chip is Goodix GT911, screen size is 800x1280 px. I managed to get touch working but partialls. First aprox 1.2 inches of top of screen are not responsive to to touches. After that 1.5" touch works normally.
I'm pretty sure I'm sending wrong configuration data array to chip and thats why its not working as it should, but have no time at the moment to toy with it. If anyone experienced with Goodix chips, pm me with ideas...
Click to expand...
Click to collapse
Update: I started to toy with stock kernel and cm10.2 (my first CM ever, was working with AOSP based SoC manufacturers sources). Problem is that device uses separate partition for internal sdcard, so have to disable emulated storage.
Things done:
- recovery
- android is built against precompiled stock kernel
Status:
- after bootanim and starting apps screen android reboots and starts back with bootanim. This was one day tryout, will debug it later today. Thanx to TeamNostalgia's preparation for cm10.2 on Amlogic MX. I used their framework and device stuff, upgraded with latest amlogic version of sources. Because of SLA I have with Amlogic, I cannot put it online.
any news abouth root final this tablet?
thx for info
stane1983 said:
I started to do some work on that tabled, but stuck with kernel touchscreen configuration. See here.
Click to expand...
Click to collapse
klobasica said:
any news abouth root final this tablet?
thx for info
Click to expand...
Click to collapse
On the link abouve is posted rooted stock firmware (mine post). To lazy ones click here
no, no...sorry i mean custom rom if is posable to create for this tablet...
klobasica said:
no, no...sorry i mean custom rom if is posable to create for this tablet...
Click to expand...
Click to collapse
It is. I'm not CM guy really, but its possible. If anyone interested, TeamNostalgia's github does have decent tree for Amlogic MXS tablets. I did some CM10.2 work for that tablet, but ended up with bootloop and reboot eventually. Didn't had time do debug it.
Here 4pda.ru/forum/index.php?showtopic=504411&view=findpost&p=29560411 is a customized firmware from Prestigio PMP3970B to work on Prestigio PMP5670C. But it does not run on PMP5670C, stands on the splash screen. Maybe someone will take to complete the firmware, it is better factory firmware for the tablet PMP5670C
ksh2000 said:
Here 4pda.ru/forum/index.php?showtopic=504411&view=findpost&p=29560411 is a customized firmware from Prestigio PMP3970B to work on Prestigio PMP5670C. But it does not run on PMP5670C, stands on the splash screen. Maybe someone will take to complete the firmware, it is better factory firmware for the tablet PMP5670C
Click to expand...
Click to collapse
I fixed U-Boot (wrote my own to support device tree kernel - 3.10.10) and fixed touch screen. I did not upload this fw, started to work yesterday on amlogic's 4.4 sources (they support both mx and m8 chipsets) (no, I cant share, I have SLA with them), I have boot, only left few things to test and then I'll upload 4.4.2.
Thank you for keep working! Waiting for rom)
Sent from my GT-I5510 using xda app-developers app
cyanodeff said:
Thank you for keep working! Waiting for rom)
Sent from my GT-I5510 using xda app-developers app
Click to expand...
Click to collapse
Here's beta version of rom: http://www.stane1983.com/prestigio_pmp5670c/
Read install instructions, needs to be installed twice, uboot still not perfect. Waiting for feedback
Btw, it's 4.2.2 rom, KitKat doesn't work good (unstable) on MXS chip.
Installed today morning. Seems all good! Thank you very much
Sent from my GT-I5510 using Tapatalk 2
babicsbalu said:
Unfortunatelly I can not able to install it because the second install is freezing all the time, now I can not install official 1.0.0.5 ROM, it stucked during the installation.
Click to expand...
Click to collapse
Rename uImage_recovery to recovery.img (when installing back stock firmware).
babicsbalu said:
Now I successfully installed the 1.0.05 but there is a quite big issue: I can not able to install anything from Play, the Download Manager is acutally (lots of system apps too) 0.0kb
Click to expand...
Click to collapse
I'm really sorry for inconveniences. With 1.0.05 files on sdcard, delete factory_update_param.aml file and boot into recovery (as if you want to install firmware). From menu using vol +/- and power for select choose factory reset (data partition is not formatted using old partition layout, thats why you have 0kb). After that you also can reflash firmware if you want (just select zip from sdcard).
stane1983 said:
Here's beta version of rom: http://www.stane1983.com/prestigio_pmp5670c/
Read install instructions, needs to be installed twice, uboot still not perfect. Waiting for feedback
Btw, it's 4.2.2 rom, KitKat doesn't work good (unstable) on MXS chip.
Click to expand...
Click to collapse
My daughter get this tablet from her grandfather on 03.05.2014 ( I guess she is lucky about that date ), and it was so slow and ugly and everything.
I installed your bety rom and everything is perfect. BUt after first reboot i get setup wizard again, but the first time after Install I only get FC ( just like I should ) but it didnt throw me back to setup wizard again.
Can I expect wizard setup every time I reboot or?
And Yes, thank you a lot for this awesome and fast work. The tablet is now so much more usable.
HVALA TI STANE MNOGO => THANK YOU STANE A LOT
@stane1983 I have the same problem as @babicsbalu. My pmp5670c is also stuck at black screen after rebooting and installing new stock firmware. I did both, renaming from uImage_recovery to recovery.img and deleting factory_update_param.aml and every time with the same result.
Please help me!
Or you can PM me (I'm from Croatia)
Hvala ti!
Well I also have prestigio tablet pmp5670C_BK_DUO and within a week it got bricked somehow. I guess that broken charging pin on cable had something to do with it - probably did a short circuit or something and boot loader got corrupt. Tabled was responding to connection of new charging cable, but only backlight turned on. There was no logo or anything.
I browsed several pages and nothing worked. I tried with official upgrade from SD card but it didn't work. It started to upgrade, android-upgrade logo came up, but after reboot nothing happened. Damaged bootloader was unable to start the tablet.
After a day or so I finally found a way how to unbrick it! Yeah.... So in attached file there is the detailed procedure, which I found on some Russian page.
Good luck!
Recovery.rar no longer available
imarkic said:
Well I also have prestigio tablet pmp5670C_BK_DUO and within a week it got bricked somehow. I guess that broken charging pin on cable had something to do with it - probably did a short circuit or something and boot loader got corrupt. Tabled was responding to connection of new charging cable, but only backlight turned on. There was no logo or anything.
I browsed several pages and nothing worked. I tried with official upgrade from SD card but it didn't work. It started to upgrade, android-upgrade logo came up, but after reboot nothing happened. Damaged bootloader was unable to start the tablet.
After a day or so I finally found a way how to unbrick it! Yeah.... So in attached file there is the detailed procedure, which I found on some Russian page.
Good luck!
Click to expand...
Click to collapse
I had a similar problem here and this method seems promising, but the recovery file indicated on the PDF is no longer available. Would you still have it lying around somewhere?
Thank you!!
PMP5670c Duo
I got this tablet 2 month ago, i have found on w w w 4pda ru 4 custom rooms for this tablet and i used google chrome to translate in english to understand what i have to do, i have instaled every one rom but i got a problem, with all custom rom the internal storage disapear. I instaled stock version now and the internal storage is there ready to be used. Custom roms are better than stock rom but it's annoyng me the missing internal storage. Anyone with this problem or anyone know how to fix it?
Edit: I instaled stock rom then i instaled again Firmware v.1.0.10 from MrCheba Repack and now i have internal storage working maybe reinstall the stock rom fix it.
I have a tf300t us sku.
I unlocked it about a year ago. I was running pacman, when in April, my lcd cracked. So, I bought a new lcd and replaced it. In the process of replacing the lcd, the digitizer cracked! So, I ordered a new digitizer. I installed it, and seems pretty solid, and looks good, but touch still does not work.
So, I thought maybe I had to update the touch firmware. Tried to run a command to fix that with the updated firmware, but my rom returned that the update_fw was not found.
I think I need to be on stock to fix it. So I downloaded V10.6.1.27.5 Only for US SKU (Android 4.2) from the asus website. I tried to put it on an sdcard, and transfer it over. It found the sdcard the first time and seemed to install the sku no problem. But it bootlooped! So i tried again, same thing! I keep bootlooping. Before all of this happened, I was already on 4.2 bootloader and all that, so i should be fine, but it's not working. I don't know how to exit this bootloop...
Edit:
I just tried to flash twrp. Seemed to flash fine, but when I try to boot into twrp I don't have a recovery....
Edit 2:
Got twrp installed. seems that I have 5% battery life. so I'm gonna charge it all the way up then try to flash the firmware.
Edit 3:
I did a cold reset, which fixed the bootloop. After I could boot I flashed philz recovery. Problem was, I had ghost touches. So it was hard to get root. Finally got root and successfully updated touch screen fw. Its running very well now, bout to slap pacman on this guy.
Hello I am still dealing with a weird problem that I posted on this forum over a year ago that was never resolved. Basically my tablet is stuck running Android version 4.1.1 (Build JRO03C.US_epad-10.4.4.25-20121228) because if I upgrade to any new versions (whether I do it as OTA or via micro USB) my wifi card stops functioning (it does not see any networks). Anyways I even went so far as to RMA it and Asus said they fixed it, shipped it back to me, but in reality all they did was roll me back to 4.1.1, saw the wifi was working and shipped it back to me saying they "fixed" it. Well of course the second I got it back I installed the OTA and wifi broke again... So I just rolled back to 4.1.1 and said screw it, I just won't update it anymore. Well this week I figured I'd try installing the latest OTA and hoped that this version would not kill my wifi, unfortunately the same exact issue has occurred and thus I have once again rolled back to v4.1.1 and my wifi works perfectly...
TLDR; Anyways apologize for the rant/story but basically I am stuck with using version 4.1.1 of Android and am considering flashing a custom rom to try and resolve some issues I am having with the stock rom's wifi, however the official bootloader unlock tools only say they work on version 4.0 (ICS) or version 4.2 (JB). I'm stuck on v4.1.1 so which tool should I use (or am I out of luck)? Thanks
v7 worked your JB version, but I think v8 will work as well. Just try them both - it's just an app. Either it works or not....
But that is the weirdest thing I've heard in a while (reg. WiFi).
What have you done on your router side? I cannot believe this is a problem with the tablet's wifi card.
Is this 'wifi not working' consistent on any router, any network?
Did you reset the router, change the channel?
Do you have possible interference: microwave, bluetooth speakers, bluetooth enabled or any other device that uses radio waves anywhere in the vicinity of the tablet?
berndblb said:
v7 worked your JB version, but I think v8 will work as well. Just try them both - it's just an app. Either it works or not....
But that is the weirdest thing I've heard in a while (reg. WiFi).
What have you done on your router side? I cannot believe this is a problem with the tablet's wifi card.
Is this 'wifi not working' consistent on any router, any network?
Did you reset the router, change the channel?
Do you have possible interference: microwave, bluetooth speakers, bluetooth enabled or any other device that uses radio waves anywhere in the vicinity of the tablet?
Click to expand...
Click to collapse
Thanks appreciate the reply - I just wasn't sure if using the wrong unlocker could brick my device... I'll give 8 a try first then 7 if necessary. The ironic part is that it requires a network connection to complete the unlock operation (I guess so Asus can cross your S/N forever off of their list of devices under warranty).
I agree that this is a strange problem as I have not seen anyone else report it. Basically I tried resolving this about 13 months ago with the help of this board and as mentioned I finally had to RMA it, but ASUS just rolled the version back instead of fixing anything and at that point I just wanted to enjoy using my tablet more than I wanted to fight with ASUS's customer service reps who effed up the first RMA job (the language barrier was also apparent in my interactions with them)...
Since over a year has gone by since the last time I tried an OTA, I hoped that the latest update would not have the same issues but alas, I'm not that fortunate.
As far as what I've tried - I have tried connecting to different networks and changing router channels and checking for interference, but the thing is, I'm quite certain the problem is with the tablet. When I first had the problem I lived in an apt building where I could 'see' 10+ wifi networks at any given time on all different channels with different routers/security settings etc. As soon as I applied the OTA the tablet could no longer 'see' any of them (even as I sat with my laptop/phone connected to wifi right next to it). I now live in a house (and have a different ISP, and a different router) and tablet works perfectly when on version 4.1.1. I don't have as many wifi networks visible from my house, but can still see a few of my neighbor's wifi networks both on the tablet (v4.1.1) and on other devices. But the second that I upgrade, all of them disappear from the tablet's view (but continue to be visible/work on other devices). I have turned wifi on/off, turned airplane mode on/off, tried connecting via wifi direct, rebooted, cold booted, booted into recovery, factory reset all data, etc. but nothing works because the tablet cannot see any wifi networks. And the second that I rollback to version 4.1.1 the wifi works perfectly... I have upgraded and rolled back probably at least 6 times and it is always the same result.
I do also get another weird side affect when I upgrade - the tablet refuses to turn off when I'm on any version higher than 4.1.1. So if I press "Shut Down", the tablet displays "shutting down" and the screen goes black and becomes non-responsive (as do the buttons, just as you would expect when turning off), but it does NOT actually shut down because if I come back 30 mins, an hour, 2 hours later I can feel it running very hot. The only way to truly shut it down is to let the battery drain...
So maybe a better question on my part would have been, do you think installing a custom ROM will even help resolve this issue? Or should I continue using 4.1.1 and not risk making the situation worse with custom ROMS?
WiFi problems are often kernel related..... Did you always take the update OTA?
Did you ever try to flash the latest firmware version manually? OTA updates do go wrong sometimes....
Although repeatedly???? It's weird. Maybe the server your tablet pulled the OTA from hosts a bad copy????
If you do not want to unlock, manually flashing the firmware would be one thing to try. OTA's patch the existing system, replace old files with new ones where necessary. Manually flashing the firmware replaces everything - a totally new installation of everything: bootloader, recovery, kernel, system and data.
But you cannot make it worse by flashing a custom rom. You unlock, flash a custom recovery (which does not change anything else on your system), then you make a nandroid (backup) of your current 4.1.1 system before you flash a rom. So you would always be able to go back to where you are now. On a custom rom you could even try out different kernels, which often are the root cause of wifi problems..
The thing is: If you want to flash a current custom rom like CROMi-X, based on Asus JB 4.2.2, or CROMBi-KK/CM11 which are KK roms, you always have to update your bootloader first. Your .25 bootloader is too old for any current rom.
You can easily do it once you have a custom recovery installed, but even easier would be to update to the latest Asus firmware 10.6.1.14.10 (after unlocking), then flash the custom recovery (TWRP 2.8.1.0), then flash a rom of your choosing.
Downside of this route would be you wouldn't have that 4.1.1 nandroid I mentioned earlier.....
Nahhh - thinking about it, I would recommend you go this route:
Unlock,
flash an older version of TWRP compatible with your current bootloader (TWRP 2.6.1.0 is ok)
make a nandroid of your current system
do a full wipe of cache, Dalvik and data in recovery
flash the 10.6.1.14.10 bootloader in recovery (I can talk you through it)
flash TWRP 2.8.1.0
flash a rom of your choice
Check out my guide, link in my signature, and let me know if you have questions
Thanks - I was able to successfully unlock my device with v7 of the unlock tool (v8 wouldn't even install). Thanks too for the advice on how to flash a custom rom safely. I've never flashed a custom rom before (have rooted a different android device before tho), so I appreciate any help.
I downloaded the blob file for TWRP 2.6.1.0 from here (techerrata.com/browse/twrp2/tf700t), but not sure how to proceed next, (also I don't see a link in your signature to your guide, but I am running a bunch of script blocking addins so maybe that's why) seems like all the guides I am finding say I need to get a copy of a fastboot program (but don't provide links), where can I find that? Again, I appreciate the help.
Sorry, my bad, I don't have a signature on XDA - wrong forum. LOL
My thread is here: http://forum.xda-developers.com/showthread.php?t=2688891
Ask any questions you may have in that thread, but it should cover your questions - I hope