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[Q] Powering a TF-101 with a dead battery

I did something drastic today. I ripped apart the old TF-101 keyboard (already broken prior) to get at the battery pack inside, opened my son's Transformer, and swapped out the dead battery inside with the one from the keyboard, only to find out that... the other pack is just as dead as the one already inside the Transformer.
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I get the same red battery icon when I try to turn on the Transformer I just reassembled using the other battery. Now, I could in theory remove the battery from the second Transformer I have in order to do this, but opening up one of these things and extracting the battery is a non-trivial task to say the least, and I don't relish doing it again. A new battery is rather expensive, at around $40 + delivery, and to be frank I'd rather just spend that $40 as part of the cost of a new tablet. However, it turns out that there are some files inside that thing that I want to be able to recover (mostly photos and videos), so I'd ask what options I have for attempting to power up that thing one last time to extract the data from it. One way would be to use the working Transformer's battery, but that is obviously quite out of the question. I could put the thing on a lab bench somewhere (just assume that I have the facilities to be able to do this) and feed it with 7.4 Vdc along the same 8-pin header that the battery uses, to fool the tablet into thinking it had a working battery, allowing it to boot. What do the wires do, and what voltage levels should they have in order to make the tablet think it has a good battery?

There is a USB mod on the forums here somewhere to feed 1 USB port on your machine 12v instead of 5v using a 12v molex feed from the PSU, which allows charging from a USB port, which would also allow data access from the same port
I`ll post a link if I find it
EDIT - Could be here somewhere
http://forum.xda-developers.com/showthread.php?t=1087321

[Q] T699 reboots on charge

I own two T699's, one looks a bit wore so I'm trying to replace it with a better looking one.
Found one on ebay but from the first second it reboots when going into the 'battery' screen (charge only when turned off)
I thought okay.. maybe a software issue with the phone, but now I already did the following:
- Odin flash it to an older version
- free Unlock the phone (using an european operator, this worked fine)
- OTA update to the newest
- USB didn't work anymore?? -> Odin to the newest
- USB working again, still unlocked
- ODIN TWRP and install CM11
- CM11 boots just fine (connected to the charger)
- CM11 gives no charging info, reconnect USB, now the charging icon is working...
- seconds later.. reboot
- works again.. no charging, reconnect charger... seconds later reboot!
-turn off, connect charger, see the charging icon showing up (full screen) reboot .. reboot.. reboot etc..
-turn on (no charger) check battery info in CM11, see this:
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weird gap..
So my conclusion is that this phone works perfectly when it's not charging.
Is this a thing you can fix with software?
If no, but there is a hardware fix, i'm also willing to try it.

cybertim said:
Found one on ebay but from the first second it reboots when going into the 'battery' screen (charge only when turned off)
Click to expand...
Click to collapse
As in in the settings??
And from what else you have posted, it definitely seems like a hardware issue bud..
Also check this link :
http://forum.xda-developers.com/showthread.php?t=1840977

hbk.vix said:
As in in the settings??
And from what else you have posted, it definitely seems like a hardware issue bud..
Also check this link :
http://forum.xda-developers.com/showthread.php?t=1840977
Click to expand...
Click to collapse
I also found another topic (not related to T699 but other samsung phone) same issue but they guy opened it up and had water damage.
He was able to fix it by cleaning the pcb's etc.
Since I have experience with this I opened up my T699..
And to my surprise there is a lot of 'sticky' stuff (think it's Cola or some other soda) so i'm cleaning it now with some PCB cleaning solution.
Will let it dry for today and hopefuly it's working tomorrow :angel:
Made some photo's as well to contact the ebay seller.. because this is not as advertised.. :silly:

Need Expert advice on DIY for OPO

Hi guys,
Yesterday my OPO fell down on a busy street and ran over by truck, cars and bikes. The display is completely broken. I tried turning on after that but the phone is not vibrating.
I took my device to service center today, but he said he tried changing teh battery and boot but no luck. So display and logic board needs to be changed.
So I decided tear down and wanted to run few steps.
1. Tried booting with wall charger but without battery - not heating, not booting
2. Connected battery and no wall charger - no luck, board not heating.
3. Connected battery and wall charger - board heating but not booting.
In all the above cases the rotor on the bottom is not spinning.
Question
1. Why board heats in step 3?
2. I plan to buy the display and battery, how do I make sure the board is perfect. BTW the board looks perfect?
3. In all the above tests, the SIM card is inserted and waited for few minutes and tried dialing my number but it says Switched off all the time. Is that mean the device is completely dead?
Need constructive replies please.
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If your device has really been ran over by truck or car, I don't think anything in the device will survive. (Maybe the plastic cover is flexible enough to withstand such pressure, but the motherboard is definitely not so strong although on the outside its not wrecked) As for the motherboard heating then wall charger and battery in, I suggest that it's because something is short circuited in the motherboard.
Sent from my ASUS_Z00AD using Tapatalk

Only heating with battery hooked up sounds to me like you are on the right track. The chip packages don't have internal wires to break these days. Good luck and report back.

I received my battery yesterday, I tested it, no sign of notification light, vibration during turn on. I tried connected it to PC, but dont know which process to look at. Any help?
Update: The process is "windows driver foundation user mode driver framework host process" but it shows when connected by other android not mine [broken opo]

[Q] Hard Bricked P3113TS Will Show Standby Charging When Off

i was looking though my closet today and found my old tablet, which got bricked 3 years ago when i switched to a new rom that screwed up my device
well i plugged it into my computer and then i got the battery charging screen you get when plugging in your device when it is turned off, but on the battery it is showing the loading circle on the battery, i have a picture of what im talking about
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<- sorry for the low quality
when i try to attempt to get into download mode i cant get into it it just shuts off and i plug it in again and in around 5 minutes it will go back to the screen on the picture
i have installed the samsung drivers and kies, and i still cant get it unbricked, if possible, give me tips on how to resolve this issue, because a extra tablet could be handy
thanks,
justotirik

JustOtirik said:
i was looking though my closet today and found my old tablet, which got bricked 3 years ago when i switched to a new rom that screwed up my device
well i plugged it into my computer and then i got the battery charging screen you get when plugging in your device when it is turned off, but on the battery it is showing the loading circle on the battery, i have a picture of what im talking about
<- sorry for the low quality
when i try to attempt to get into download mode i cant get into it it just shuts off and i plug it in again and in around 5 minutes it will go back to the screen on the picture
i have installed the samsung drivers and kies, and i still cant get it unbricked, if possible, give me tips on how to resolve this issue, because a extra tablet could be handy
thanks,
justotirik
Click to expand...
Click to collapse
Keep it in charging for a few good hours and see if it goes somewhere in download or recovery. A hard brick won't even show a battery icon.
Without a working download or recovery mode, there is hardly any help.
Tried with another set of charger and cables?

billysam said:
Keep it in charging for a few good hours and see if it goes somewhere in download or recovery. A hard brick won't even show a battery icon.
Without a working download or recovery mode, there is hardly any help.
Tried with another set of charger and cables?
Click to expand...
Click to collapse
i would have a extra charger if my tab didnt have a iphone like charger instead of a micro usb traditional charger

[Help] Recover data from a huawei mya-l41 with a damaged screen and an unstable USB connection

Dear XDA forum,
Short story:
- Phone (huawei mya-l41) felt into water
- Recover for some days after a good bowl of rice
- Screen stops working completely afterwards#
- Got the phone to get back data (Unfortunately no backup was made )
Tests:
1. Preparation for connection to the PC
- Installation of MTK65XXX while in Windows Test Mode due to unsigned drivers
- Installation of adb/fastboot from here: https://forum.xda-developers.com/t/...vers-15-seconds-adb-installer-v1-4-3.2588979/
2. Connection to the PC
- USB Connection is unstable => crashes after ~3/5s
- Screen is not powering on
- Phone has already been charged for 2 hours to ensure power is high enough
- Trying to put the phone in recovery mode, but I'm not sure if I could reach it
- Being able to connect to the UART Port by luck in that range via Terminus https://github.com/Eugeny/terminus
and I can see the output "READY" printed out in series, but I don't know what it means
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=> I tried to search on the forum with the keyword "READY" "ADB" "USB" but nothing interesting popped up
=> Searching in the Android source code will not help to, due to massive finds I guess
Any idea how I could proceed further?
Thanks a lot for any hints!

Rice may not work for drying phone. You'd better open it up and dried the sim and all that you could with a tissue. And you should also replace the battery if it has swollen.

bobii said:
Rice may not work for drying phone. You'd better open it up and dried the sim and all that you could with a tissue. And you should also replace the battery if it has swollen.
Click to expand...
Click to collapse
I've got the phone after some days (1 week I would say) when it was not working as it's not mine. I expect the phone to be dry since there. The person already bought a new phone, he just would like to get back the photos
Good point for the battery! But it seems the battery has not swollen