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
Related
Hi everyone,
I am working on building some htc desire docks as I havent phone a commercially available one that suits (and id like to see my work on my desk!)
The question I have is to do with charging status, basically I want to put an LED in the dock what shows the charging status, the only thing I am not sure about is how to go about actually finding out the charging status! Does the microusb send a signal when battery reaches 100% ?
I think its done off the voltage reading. If you buy a charger which already has an LED indicator on it then you could re-wire it no?
Also you already have the status on the phone LED itself so do you really need this?
bridgstfer said:
I think its done off the voltage reading. If you buy a charger which already has an LED indicator on it then you could re-wire it no?
Click to expand...
Click to collapse
Now that is a good idea!
Also you already have the status on the phone LED itself so do you really need this?
Click to expand...
Click to collapse
Also true, however the plan gets a bit more advanced at this stage, my pc case has colour changing glow lights underneath it (just led's that output different colours at different voltages) So as well as a desktop one I was looking at modifying my case so the phone sits ontop, charges, and the leds change colour when its charged, pointless I know!
nice thread, but sadly no one here seems to be doing diy docks? ive seen some awesome looking diy docks for the droid.. herghost, are u done with your dock?
just wanna share my recently diy lego dock, hope others can join in the fun
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i´m planning to build a dock for my desktop with integrated vfd-display for my pc next week....i´ll post pictures, when it´s done.
Can't wait to see it. I'm modding a iphone one to take mine as that's what I have lying around
I was doing a screen replacement on a Nexus 5 and a small part from the motherboard fell off.
3 pictures to illustrate the problem here:
http://min.us/mKOC4FQe6F0HI
Afterwards, the mobile connection was a lot worse than before. Now, 2 weeks later, the phone's connection has become unusable and it constantly shows no service. Only very rarely does it have any sort of connection (Edge/3G/H/4G).
Questions:
1)What is the part that came off? (see album above) My knowledge is a bit limited but I'm quite sure it has to do with the connection? I notice there are 3 other parts exactly like this spread over the motherboard.
2)Can I repair it? Do I glue it back on? Do I solder it on? Does it somehow click on? (I have tried if it clicks but this part is so tiny it's almost impossible to really handle
3)Based on my explanation, do you think this tiny part is the only cause? The phone still had some connection at first but it got worse. I'm also planning to order replacement antenna cables to see if that helps.
Thanks in advance!
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In my case.. I had to replace the charging circuit Cuz it was 'broken' as described by the cellphone shop.. It has connections to the antenna.. Now phone is fully working.. Before that though, I tried different sim cards with different companies (bell Rogers and fido) all worked on my phone except my carrier sim card (mobilicity). After replacing the circuit I just mentioned everything works fine. Cost is 25$
Needs solder it's an rf trimmer /radio frequency. It's vital to an ariel of one type or other. If you want to risk a bodge assemble everything except the back and hold it in place with bluetack. If it works I was going to say epoxy it but don't. Get someone to solder it. It's easy to do if you have the skills.
Oh vital it's right way round and has now been turned. There should be a slot for tuning it.
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]
Hi forum,
a friend of mine gave me his completely dead Nexus 5X (no important data) and i wanted to see if i can revive it. I baked it in an oven according to information online and now at least it charges properly but i think i burned the (power) button solder joints. (Summary)
With dead phone i mean really dead. No lights, LED, screen or any sign of life.
Since there was nothing to lose i looked up an iFixit teardown and disassambled the phone until i had the motherboard on it's own.
As according to various online guides / posts i removed the heat cover / heat sheet of the CPU and those other elements (probably GPU? i don't know what they are), then covered everything but the CPU die with aluminum foil and heated the CPU with a normal old hair dryer for about 2 minutes.
To my surprise it actually showed the charging icon and attempted to boot once (it had a boot loop previously) but after about a minute it went back to completely dead.
Then opened the phone again and took out the board, put it on baking paper inside a glass thingy that you use for baking and put it in a ~180°C pre-heated oven for about 9 minutes.
Once everything cooled down after 30 minutes i reassembled the phone and it actually charges normally without any problems.
Unfortunately the phone does not seem to react to any (power) button(s).
From the reference images from iFixit i think that baking the board probably blew off / burned some sort of resistor (i have no idea what it might be) which you can see in all the images in detail.
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(Credit: iFixit.com)
Now look at one of the pictures i took:
You can view this image and all the other photos i took in this imgur album:
https://imgur.com/a/tST5V
Here's an image containing the important close up photos edited onto the overview image so you can see details without guessing where it is on the board. I had to remove the background to make the jpg be accepted by imgur.com:
https://imgur.com/a/0gOg2
Any and all ideas and recommendations are appreciated, i might edit this post to include microscope pictures tomorrow.
Regards, Daniel
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.
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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