Hi!
I'm trying to fix my Google Nexus One replacing damaged hardware from an accident it suffered months ago. So far, I've changed the flex cable ribbon, the gps antenna, the lcd display and the digitizer.
After changing all of that, the phone seemed to work fine, but the desktop dock connection wasn't working because the connector at the mainboard was damaged. I tried to fix it solding it with tin (VERY BAD IDEA...) and instead I got the motherboard damaged. Somehow, the bootloader wouldn't boot after showing the X logo...
Therefore, I bough a broken nexus on ebay and replaced the motherboard. Now the phone boots fine, but there seems to be a problem when turning on the display.
Not every time that I switch the phone on the lcd display does too... 60% of the times the phone boots without showing anything on the display, and when it does show the boot process and boots, the display doesn't come back after the phone goes to sleep mode. It's like a black screen of death, but not only once the phone is booted, but also when turning it on.
I've tried changing the default HBOOT to blackrose,switching between different ROMS, or even repartitioning the sdcard with no success. I know that most of you would think that I should stop trying to fix the phone and get a new one, but I really want to fix it, it means a lot to me (and I'm also learning a lot from this!).
I'm kind of stuck now... I need your wise advice... what do you think is causing that behavior? The motherboard? The LCD? Any advice on what to do to fix it?
Thanks for everything!
Sounds like the connection between the LCD and board.
Sent from my Nexus One using xda premium
Related
I was flashing a rom the other day (that i had flashed in the past and worked fine) and then i noticed that the touchscreen did not work. (everything else worked)
i flashed back to the cyanogen rom and my touchscreen still did not work.
(when i say my touchscreen doesnt work i mean that i cant touch anything, not even the android to set up my phone)
the trackball works but i am FORCED to touch the android and i cant
ive been flashing and still no luck, any ideas on what happened to my touchscreen or any ideas on how to fix it?
please help!!
I've seen a few of the threads. More than likely your touch screen has died (hardware issue - not software) and I'm not sure if that's replaceable.
Ask a technision :/ like the guy above said its proble the tS died may need replacement or ribbon isnt connected rite .
So whats my best bet in going about this?
i dont know what to do :/
if you feel like your able to take apart the phone and replace the screen, you could always try it. either that or buy a new phone or possibly a cell phone repair shop if you even have one.
i decided to kinda drop it.
it works now...
thanks for your help anyways guys!
D:
I wouldn't be DROPPING it to fix it...
Problem is probably a badly seated ribbon cable, which means it is STILL not well seated and will probably happen again.
Look in the screen hinge as you're sliding the screen open -- see the little ribbons in there? Probably got yanked a little.
ok guys, watched the n00b disclaimer video, and of course I searched high and low, but cannot seem to find a thread on this. Both my wife and I have VZW droid 1's. I take very good car of mine so it has been flawless, unfortunately, her screen appears to be dead (only lights up, no response to touch screen, will not display images) She has USB debugging turned off so I cant access the phone from what I can tell. My question here is can I simply put her motherboard in my phone and get her information off of it? maybe turn on usb debugging while its in my case?
I know it's alot of work, but she has a lot of information stored on the phone and needs it out of it.
Any help would be appreciated. Also, if anyone has any idea what is wrong with the screen let me know, i looked at all the cables and they seem perfect. it seems like most people that have dead displays still have touch, but this has nothing, could it be simply a software issue and have nothing wrong with the hardware?
Thanks in advance guys!
Your motherboard swap should be fine.
I bought a broken droid off ebay exhibiting your issues, all it took to fix it was unplugging and replugging in the display cable. I then switched the motherboard with the one from my milestone and it worked fine, and without issue
I have been trying to repair this phone, but the usual faults have not turned out to be the problem. This is the background on the repair efforts:
In my research I found 3 main causes for a dead touch screen.
1) Corruption of system software.
2) Failure of digitizer cable (hinge FPC)
3) Failure of digitizer screen (touch panel)
To check for #1, I flashed the firmware again (after a wipe). I downgraded to Android 1.5 because I wanted to root the phone and install CyanogenMod Android 2.2 Froyo.
This was a big mistake because I learned that when you don't have a working touch screen, you cannot get past the "Touch the Android to Start" screen.
So on to step 2 - replace cable (hinge FPC). I have a G1 parts phone that was lightly used in good condition before it was damaged. There was no damage to the sliding section, so I expected the hinge FPC to be in good condition.
So I installed the hinge assembly with its hinge FPC from the parts phone, but this did not work either.
So next I installed a new touch panel (digitizer screen), but that did not fix the problem either.
I had a chance to borrow a working G1 motherboard, and I was surprised to see that the phone was working with the borrowed motherboard.
So my question is whether my problem motherboard can be recovered with a software solution, or if these symptoms indicate a hardware failure.
I thought that a wipe followed by firmware flash would eliminate all soft system errors, but I am not sure if the wipe and flash really erase absolutely everything, or if there is something else I need to do to get it working again.
Thanks.
more than likly it was the point in the motherboard where the flex cable connects. try using some electronic parts cleaner.
i have ran into this a few times and simply replacing the motherboard has only helped a twice, when i cleaned it up it worked.
That sounds reasonable. I still have some Tweek. I'll give that a try. It worked with the same kinds of problems on computer sockets.
Okay. You are on the right track. When I went back to the phone, I actually got two taps out of the screen, which it hasn't done in a long, long time. (I was running keyboard only for a long time before I could take it down to fix it.) I attribute that to just disturbing the contacts with so many assembly/disassembly efforts.
After I applied Tweek to the joints, it ran well.... for about an hour. Trying again was no luck, so I don't think I'm going to mess with the contacts anymore. By the time you figure how infrequently motherboards come up for sale and the cost, I think I'd do just as well with a trade in on a flat-rate repair.
But at least now we know for the record that there is another cause of dead touch screens.
well i have about 13 motherboards, if your interested let me know
Thanks. What has been your experience with changing motherboards?
The reason I ask is because the service manual wants the phone to be tuned again after a motherboard swap. I see a lot of people changing motherboards, and I can't believe that is much of a problem when you don't see anyone complaining about the phone not working well afterwards.
A spare motherboard might be a good idea for a diagnostic tool. It would have saved me a lot of work changing the touch panel and cables if I would have had a motherboard to try first.
I thought I had a good spare in a damaged phone, but when I took it out the other day to test this phone, I found out it had physical damage too. The SIM holder and RF shielding were dented, but the killer was that the daughterboard cable connector was bent.
I suppose back when the phones were $900 you might try to fix something like that, but it's hard enough to do a connector swap on a computer motherboard. I can't imagine that even the factory has the equipment to properly swap the connector even if you can get the part.
How much do you want for a motherboard? On that famous auction site I've seen them go for around $10 to $30. I could kick myself for not buying the last one I saw at $7 because I thought I had a spare.
Hello all,
My Xperia was in a serious bootloop that I couldn't fix, not with pc companion not with flashtool flashing stock roms. So I gave up and sent it to the closest Sony Mobile certified repair store, it took them one month to tell me they couldn't fix it, they said they opened it, changed the battery and it still had the same problem so they also gave up and gave it to me, they did say the problem could be the motherboard. I'm now living in Brazil and getting a motherboard for the c6602 is impossible first of all because the phone was never commercialized here (and importing is impossible, it'd take 2.5 months and they'd charge me 200% of the part price, unfortunately that's how Brazil works ). Something interesting that happened is that when I got my phone back they had solved the bootloop issue but they created another issue, the phone starts makes all the sounds the screen turns on BUT all you can see in the screen is the black color, so the backlight is on but nothing shows up.
Could I be able to fix this via software? or the only option is changing the motherboard (or maybe fixing something on it)?
If any of you knows how to fix this I'd appreciate an answer.
Video here: http://youtu.be/3I4VIBAXUsc
psycho-punk said:
How do you know it isn't a display problem?
Click to expand...
Click to collapse
Because I sent it to sony and they said the problem was the motherboard and the problems the phone's been giving are pretty random, for example at the beginning the problem was that it had random reboot each one with more frequency, it when from that to just work with the ac adapter connected, it went from that to a bootloop of just showing the sony logo and restarting, after I got it from sony the problem is that it boots app (without needing to be connected) it makes all the sounds like it was working perfectly but the screen is ON but black. So because all this I'm convinced it's the motherboard.
I see changing the battery didn't fix your problem.
I think it's so sad that this phone with just more than a year of life are getting this serious problems and sony isn't doing **** to help us. They keps my phone 1 month just to tell me that it couldn't get fixed, they said they changed the battery and all but still the same problem. I've reached a point when I just don't trust sony anymore, I'm getting a galaxy s4 on monday but still I wanna fix this crappy-phone.
Well, in my case it happened out of nowhere, I wasn't doing anything special with the phone..., I'm thinking maybe restoring the TA partition would fix something? I don't know... I found the motherboard for 80 euros in aliexpress
Hi there can anyone help me please on this matter.
My wife has a HTC One M7. last week the phone fell in to the bath. I managed to open the phone up and clean it.
The phone was taken apart and cleaned correctly using the correct circuit board cleaning solution (sorry cant remember the name).
I then ordered a new battery as the old one was not holding full charge. I also ordered a new screen + digitizer as the old one was cracked.
I have put everything together and charged the phone.
The phone charges correcrtly and has no problems at all.
When i switch on the phone it starts as normal and makes normal sounds etc BUT the screen is dead.
There is NO life in the screen at all even though its a new screen etc.
I know that the old screen is working and even using that i still get nothing.
Has anyone else come across this issue ?
Are there any guides to test the screen driver IC etc ....???
Thanks for your help in advance
It seems like that you have got a faulty screen.
amebb said:
Hi there can anyone help me please on this matter.
My wife has a HTC One M7. last week the phone fell in to the bath. I managed to open the phone up and clean it.
The phone was taken apart and cleaned correctly using the correct circuit board cleaning solution (sorry cant remember the name).
I then ordered a new battery as the old one was not holding full charge. I also ordered a new screen + digitizer as the old one was cracked.
I have put everything together and charged the phone.
The phone charges correcrtly and has no problems at all.
When i switch on the phone it starts as normal and makes normal sounds etc BUT the screen is dead.
There is NO life in the screen at all even though its a new screen etc.
I know that the old screen is working and even using that i still get nothing.
Has anyone else come across this issue ?
Are there any guides to test the screen driver IC etc ....???
Thanks for your help in advance
Click to expand...
Click to collapse
MIght be a faulty screen as said above, maybe a broken or badly connected flex cable. And since the phone went into the bath, maybe a defective motherboard. Its very hard to tell.
as @alray said, it's hard to judge what's the cause of the dead screen, it may be one of the three causes.
so first, you can connect your old screen to the motherboard, if it can still work, to check whether the mother board was damaged or not
if the old screen can be lighten up, you can exclude the possibility of damaged motherboard.
second , you can connect your new screen to the motherboard again. Just be carefully and pay attention to the connector. Make sure it is connected correctly. If the screen can't be lighted up, you need try to use achohol or something else in a small brush to clean the connector. Handle gently to avoid damaging the IC. After that check whether the IC has lost some part or not. Then, if the flex cable or connector is fine, you can connect the new screen to the motherboard again.
finally, if the new screen still keep the same same situation. you can almost judge that you ordered a defective part.
May the steps above helps!
Hi there
the screen works fine as well as the connectors.
These have been tested on another htc one phone.
I have noticed that the motherboard connecter is damaged..... i will try to get some pics up later today.
Thanks