So this was my first breakdown of a phone...my brother gave me an HD2 with a non-responsive digitizer, everything else seemed to work just fine.
I disassembled it, accidently tearing the flex cable after it gets thin and goes to the volume buttons. Anyway...I replaced the digitizer...thinking I could just modify the volume via software controls, and stupid me had previously set the hd2 to boot into magicdlr always when the phone turned on. So when I turned on the phone I couldn't do anything because it would boot into magicdlr and I had no volume buttons to scroll up and down, and the option selected was boot into windows which was not on the phone (only cm7 was at this time).
Anyway...after getting a replacement flex cable, and reassembling everything, I couldn't get the lcd to work. Backlight would light up, but no picture, no sound, just a vibrate and the backlight turning on. I tore it down, triple checked all the connections, and still the same thing
So I tried a seperate lcd assembly, tripled checked all connections, and still same issue as the above paragraph, backlight but nothing else when I try to power on. I also retried the old flex cable (the one without the volume connector) and that didn't make a difference either.
My only guess is that I messed up the lcd connector on the mainboard, even though it doesn't look visibly damaged in anyway. Does anybody have any other ideas/suggestions?? I would love to get this up and running as its been my first smartphone project...I've done lots of works on desktops and laptops but never smartphones.
gdawson6 said:
My only guess is that I messed up the lcd connector on the mainboard, even though it doesn't look visibly damaged in anyway.
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This is my suspicion too!Even not visible at first sight, try again with a magnifier!
Good luck!
Related
aright previously my LCD screen was cracked well i got the replacement LCD screen and it works fine. BUT my problem now is that its just displaying a white screen. Nothing else. I take off the battery put it back on turn the phone on and i get a white screen no letters no nothing.
Does this mean my phone is a brick?
i still get response when i hold down the comm button it vibrates. The volume slider responds with the volume going up and down. and when i try to hard reset via holding the comm button,voicebutton,camera button and hitting the soft reset button it responds to it and resets the phone apparantly.
So i know for a fact the actual phone works..but its not displaying anything but a white screen...is there anything else i can do ?
If you have replaced the screen yourself, it may be worth trying to re-fit it again. Make sure the connectors are in pefectly, and make sure there is no dirt on them. If the pda still responds to button presses, it's fine, it's only the srcreen that's damaged/non-functional...
To see if this is the case, try tapping on the very to left of the screen, and see if you get the start menu pop. If you don't it's prolly the connector not plugged in properly, if you do, then the connector may be damaged...
ok im trying now..but how could it be the screen if the screen is giving me a perfectly white screen and its been tested to be working correctly?
sweeet i reconnected everything and it worked thanks for the recommendation dood much appreciated
sojiroxiii said:
sweeet i reconnected everything and it worked thanks for the recommendation dood much appreciated
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Click to collapse
Nice to see that my reccomendation worked for you. I've never replaced a colour LCD screen before, but some of the B&W ones i've replaced have had similar faults. It's the same with old cartridge games if you think about it, you used to have to blow on them ocasionally...
Modern technology may be perfect in every respect, but the manufacturing methods arn't.
Hey i installed gingerbread android 2.3.7 on my phone again but this time im getting really weak wifi signals... i'm only 5 feet away from router. It was not like this before so i do not know whats going on ( i only dropped my phone twice)
can you guys help me? is it a software issues or hardware?
happy thanksgiving
I would recommend installing a few different roms (that are known to work with wifi) and see if anything changes/improves.
If nothing improves, maybe flash back to winmo 6.5 and see if wifi improves.
If nothing improves then, you may have damaged your wifi antennae when you dropped it then hit up T-mobile!
Best of luck mate.
Possibly knocked the wifi coax loose from the mainboard. It's pretty easy to open up an HD2 and reattach that cable, I've had mine come loose before and that's what I had to do.
I'd definitely try the steps in the above post first just to make sure it's not a rom or kernel specific issue. And if it's still under warranty, don't bother taking it apart and ruining your warranty, obviously just return it to t-Mobile.
hey can you explain in more detail how to push back the wifi coax cable your talking about
Remove the battery cover, battery, sim card, and sd card.
Remove the 4 torx screws that are under little round stickers under the battery cover.
Using an old credit card or a plastic knife, slide between the screen and the housing to release the little plastic clips one by one which hold the housing to the phone's chassis.
Take your time and be careful not to scratch the housing or stick the card/knife in too far, damaging the fragile stuff inside,
It helps to put a little pressure on the back side of the screen wth your thumb while orying with the credit card (back of screen under battery)
The wifi coaxial cable runs from one corner of the mainboard, up along one side of the chassis, is taped together with some other wires, and leads to another small board up near the top of the phone.
Check the connections at both ends, making sure they are connected firmly and are in straight.
You might want to unplug them, just to be sure and hear/feel them click into place.
Take your time, set yourself aside a nice little workspace, and if you are unsure of anything, don't hesitate to come back here and ask.
There is a disassembly video here in the HD2 section somewhere, I think it's in HD2 General. It'd be worth it to search for it and watch at least the first part of the video, just to get an idea what you're dealing with. It's not a very hard job, it should take you like maybe an hour/hour and a half start to finish.
This will void your warranty permanently though.
Thank you sir i just followed the steps you did and it fixed the problem my wifi works fine but now i have another issue....
i dont know if i touched something or disconnected something in the process but my sound, vibration and volume button does not work. External speaker is not playing any sound (no music or key button taps) and no sound is made when placing a phone call BUT the other person on the end can hear me just fine so i'm guessing i might of disconnected like the speaker. ( my assumption)
thanks again for your help
Oh and when a call is being placed or recieved the screen automatically turns off and it becomes non responsive i.e if i take my phone off the ear and want to put it on hold the screen is still black instead of turning back on
The screen going black during a call is a pretty common problem with the HD2, and is likely not related to disassembling your phone as long as the screen functions normally otherwise. Since you didn't take your phone far enough apart to affect the light/proximity sensor, I can't imagine how disassembly would have affected it. You would have to take the mainboard and screen out from the chassis to get to that sensor.
The volume problem on the other hand, is probably due to either your volume rocker not being placed correctly during re-assembly, or the speaker contacts not being aligned properly. You'll have to take it back apart and ivestigate what went wrong.
Try going into Settings/Sound, and checking that the volume is not turned all the way down. If the volume is not all the way down, then you should be able to hear sound, so your speaker is probably not aligned properly.
Does your volume rocker feel different than before? If it doesn't make a definite 'click' when you press it, then it is probably slightly out of place. Also look for any wires that could have been pinched and damaged when you snapped your phone back together.
What is a volume rocker? When i start the phone it usually vibrates once then goes through the starting procoess. Now it doesn't vibrate at all. Phone turns on and i click the volume button up and nothing happens. I checked settings and everything is up
I have the phone opened as we speak and the reciever cable is connected and the vibrator cable is connected too. I tried to use tweezers to see if i can unhook it but their on too tight so thats a good thing. The two orange dots on the volume thing.. the bottom on was slightly off so i put i centered it
Still nothing works. no vibrating no sound ( the person on the other line can hear me but i can't hear anything) but the phone works great.
Im so confused
The volume rocker is the button that 'rocks' back and forth to control the volume.
It has to be positioned right in order to push the contacts that lie beneath it.
Since your phone's apart right now, what happens when you hold the battery in it with one hand, boot it up, and press the volume button contacts manually? If they buttons themselves do nothing, then it must be that they lost their connection somewhere, you'd have to trace the wires and figure out where they're not connected. If they do work, then the volume rocker was just misaligned.
As for the speaker, it has to be that it is not contacting the two little contacts correctly. Look at the speaker and make sure it is sitting correctly in the housing, and look ffor any obstructions near the vibrator motor.
No i can't press down on the volume button ever since i opened it it hasn't fit back right. Doesn't make a click sound
and what contacts on the speaker should i be looking for? are they under the speaker itself? should i remove the speaker? Theres no destruction on the vibrator its looks though like its sitting kinda tight between that camera flash being there..the metal spinning thing on the end of it can spin 360 so nothing its preventing it from moving.
I also can use my headset and the sound and call works fine besides the going to the black screen and not responding. i also noticed my camera does not load up either. but that could probably be solved with a clean install of gingerbread nand rom
Yesterday I was working on my HTC HD2, flashed WP7 Mango on it, and opened it again to align the plastic keys with the hardware keys undeneath. It didn’t really work out, so I carefully seperated the digitizer from the display to realign theglass abovethe keys. Now The keys work perfectly, but the screen doesn’t react anymore. I have no clue what could’ve went wrong, the digitzer flex cable is still perfect, aswell are the others which connect the screen to the motherboard. Anyone have a clue what could’ve went wrong? I hope it can get fixed easily
I’ll try to hold the ‘end call key’ while using the display. Seems like that will help to entight the connection.
Fix: So I took the Display out again and checked the connection of the digitizer at the back of the screen. It was loose. So i've put it in place and fixed the connection with some extra tape.
Hardware Issues after replacing battery, USB/Audio connectors & main board
Need some help, and figured you guys would be the right people to direct me on a fix or at least narrowing down the cause of the problem
Phone - Verizon G2 v980
TLDR - replaced 3 different parts, and now phone display won't show anything - just black.
It all started when I was having some audio issues with the headset jack being loose, and headphones and aux output disconnecting easily and often. It was pissing me off, so I decided to replace it. (I'm no stranger to tearing apart and fixing small electronics but I never worked on the LG G2.
I figured since I was going to open it up, I'd replace the battery at the same time, and bought both off ebay.
When they finally arrived, I opened up my phone following a couple videos I'd found online (btw, no little black screw in mine, as it was a refurbed replacement via squaretrade.)
Unfortunately, through a combo of cheap 3rd party battery with a very stiff ribbon cable, and my clumsy fingers, I managed to destroy the logic board's battery connection port.
So I went on ebay to find a new board... I found a used verizon 32gb (mine was 16gb) board and got it delivered.
When I put it together, something is not working right, but I can't be sure what it is...
I think the board is bad, but am not 100%.
Screen is black
I can connect the phone to my computer, and it will autodownload the LG Verizon software, and show up in my file explorer. There's some files still there, but it looks like it was attempted to be cleaned, but not factory reset wiped (some personal data still there) but the dates are all showing 1970ish....
I have the phone connected up to the original charger, and the notification light pulses light to dark red as it charges up.
When I plug in the charger, I hear a buzz, and sometimes even a tone.
I hold down the power button, and eventually it vibrates again, and the notification LED pulses blue & green, and there's a brief backlight looking light with some vertical lines, another buzz and black screen. I'd think it was shut down, but it still shows in the computer, and the light to dark red pulsing continues (charging?)
knock on doesn't work
Should I return the board?
Saw some other threads about the proximity sensor, so I can check that out, but I didn't touch the screen...
Thanks in advance!
Update
No difference with proximity sensor disconnected.
With the old board in with busted power connector wedged in, it does nothing, except when plugged in, where it buzzes repeatedly.
Hi.
Just replaced my old battery with new one and after that... suprise - screen won't turn on.
Tablet works ok, I can hear sounds, vibration, I can even hear taps (so touch sensitive layer is working fine) but screen is dead.
Inside there are only 3 connectors, one battery, one in the upper part and one in the lower, both firmly placed and in full contact.
Is there something else I am missing?
Screen was working fine when I opened tablet, so there's absolutely no way to damage anything during opening. Worked without back cover.
Then I turned it off, replaced battery and turned on, and now screen is dead...
Any suggestions, help? Any connectors that could disconnect?
Or any possibility that screen was damaged when unplugging old battery?
Plz, guys, you're so smart
And how the lcd connects with motherboard?