Gt-i9100 No Soft Buttons - Hardware Hacking General

I run a cell phone repair store and have recently run into some problems i'm hoping you guys can help me with.
I was bringing in the Samsung Galaxy s II completed front assembly parts for the last while and repairing broken screens.
Recently my supplier ran out of black galaxy S II fronts so I ordered white in place of them.
After installing the motherboard we realized there were no soft buttons, the home button clicks but the two touch buttons don't work.
The black fronts I have work but the white ones dont, is there a difference between the 2 phones? are they not identical and are the parts interchangeable?
Update:
I found a new supplier and ordered some Black assemblies and none of the soft buttons work on those either!! I don't understand!
Is there a compatibility issue here? I know the motherboard is good, is there a driver for the soft buttons or something? Some sort of firmware?
Thanks

When you click on them do you see the lights coming in ?
Maybe there's some connectors issue too

No there are no lights that come on, no response no lights. I just need some educated guesses, is this hardware or software?

Strange.
Worked on original board but didnt worked after the installation of the new motherboard + cover.
I think something broke during the process. I know that those wires are kinda cheaps so maybe there is a wrong contact somewhere or a short.
I will guess with a short in your wiring
Sent from my GT-I9100 using Tapatalk

I would have thought that too except these are the completed front assemblies, all you do is remove the motherboard and move it over, there is no wiring involved. Could it be anything else other than hardware.

*#8999*8378# = Test Menu
*#8999*667# = Debug Mode
One of these two code have the built in option to check key press. It will show an hexadecimal number of the key while pressing.
Can you try it and tell me if the soft keys are recognized within the test key menu ?
If yes ill suggest to flash firmware with odin to have a clean phone
Sent from my GT-I9100 using Tapatalk

Neither of these codes do anything, the lights are not even lit up. On my Galaxy S II when the phone boots the lights come on, it's almost like there is no power to the cable at all.

I know from previous experience with the SGS Vibrant that installing an old firmware edition and flashing the soft keys fix some problems, but at least they lit up even when they did not work. Could I possible have 7 fronts with bad buttons? What are the possibilities here?

is it on warranty?
id return to it

syndragon said:
is it on warranty?
id return to it
Click to expand...
Click to collapse
That is so not helpful as I have 6 with this problem and non of them are mine.

if it doesn't light up but has display, i have a feeling it's fked up already. get new screens.

There are no Gt-i9100 with no soft buttons..The screens are faulty and as they said u better return them for new ones...

I understand they should all have soft buttons, I was hoping this was a driver compatibility problem between the black and white fronts or something.
I guess this is a hardware issue, unless anyone has any other ideas?

Related

What a STRANGE problem with my buttons and LEDs! Ideas?

Hi guys!
Long time no post!
I hope you can help point me in the right direction.
Two things started happening with my 8525 TyTN, rendering it unusable. I do have a backup one, so it's no panic. But I would LOVE to try to repair this.
Here's what happens!
1 - The two LEDs in front don't work! No green; no blue; no amber. (HOWEVER, When I first replaced the battery after a hard reset, I did see is glow red for a second!)
2 - None of the buttons on the front work! None. Start/End, the D-pad, mail, internet explorer. All dead!
Interestingly enough... the LCD screen is perfect, as is the touch screen.
The unit also works perfectly fine.
I did a Hard Reset.
I am using WM6.0.
I am wondering... PERHAPS there is some kind of ZIF cable that goes from the body to the top panel? MAYBE that came loose?
If you have seen inside your TyTN, is there one cable/ribbon for lights/buttons?
If so, that would explain it!
If there are two cables/ribbons.... one for lights, one for buttons, then the odds of them BOTH falling out are near impossible!
I would LOVE to hear any ideas or thoughts!!!
Thanks as always!!!!!
Mike
Hello and welcome to a new phone!
I have a similar problem, mine sometimes gets a white screen and the D-pad buttons rarely work for long.
It is quite possibly a loose ribbon cable.
There is actually a thread here about this issue - just do a search for 'white screen' or similar and you'll find it. It was posted to within the week so shouldn't be far from the top if you browse for it, but I can't remember which Herme's category it was in.
There's even a full guide with pics to pulling your 8525 apart!
Cheers! Oggy. ó¿ó
try a new rom,.
I have the same problem. I thought it was bcs my TyTN fell down once. It started with Iexplorer always popping up when I wanted to do something. I thought the IE button at the top was stuck or something and when I pressed hard on the message button everything was okay. All buttons worked. But after a few days they stopped working and pushing the message button wont work also. And both the red and green call button leds are always shining. It sometimes happens that the dpad works for a second and than nothing.
I used the original wm5 and flashed to 6.1 now, no change tho.
it's not the rom, tried several roms now
for me it's just the call answer button, but this is annoying enough
there are some topics in the hermes section which describe the problems you encounter or even worse problems (the lcd flickering or just giving you a bright shining white) and they all say it is a loose cable connector right under your dpad
some of them opened their tytn (guarante already gone) and put some sort of paper or rubber or sth else on the connector.
other say tighten or loosen the screews worked for them, but none of the solutions seem to be final, it always works for some time.
if you have still guarantee i would try sending back or try somewhere else a repair, that is what i will do with tytn
i hope i do not have to pay for the repair
good luck
Loose screw
I was able to fix this problem after ATT told me that I was out of warrenty and it was going to cost 499.00 for a new phone.
I it turn out it is a loose screw on the inside and to get to it you have to undue 11 screw to get to it. I might be able to fix it for you. I dought you would be able to get into this phone and not hurt any of the other functions.
Rick
Hi,
could you advise how you managed to fix it?
Thanks.
button failure and white screen
I have the same problems, if I turn off and on for 3/4 times everything back to normal. But is really annoying because I miss calls.
To me seems a software issue.... I can solve it by turning off the screen does not make sense hardware problems
have a look to this post:
http://forum.xda-developers.com/showthread.php?t=435281
I have still to test the suggestion of schaps advance config version 2.02.1.0.0
Sorry it not a software issue and you can flash a 100 roms and it still won't work. You simply have a bad flex cable and possibly a defective dpad circuit board. You have to crack open the phone to replace it and it has to be carefully done. There are tons of DIY's about opening the phone and replacing the cable. There are even YouTube Videos about it.

HTC HD2 Screen Unresponsive

Hello Gents and Gals. I am trying to fix my friends HD2, I flashed his ROM with Energy couple of months ago and all was working fine. He gave the phone back to me saying that it is locked.
I tried unlocking the phone but it seems that the screen is unresponsive, so I flashed it again by going into the boot loader screen "Volume Up + Power Button". The phone stated that it is starting for the first time but the screen was still unresponsive. Any ideas on how to fix this issue? Or do I need to tell him to send the phone back to HTC for repairs?
Sounds like the touch screen died ....
Time for a repair ..
Also this really should have been posted in general , as it is not a ROM release , just an FYI
Aww okay. I'll let him know. Thanks.
I'll post like this in General next time. Tks.
HI, I have now the same problem after ROM Flashed, did you solve the problem by yourself, or really the touch screen died.
Rgds
Same thing with me. I ordered new digitizer+LCD and changed them, but the screen is still unresponsive. Other ROM didn't help.
Some advices?
i seen this happen with several phones, reflash to stock and send to HTC they will repair it for free.
I have same problem,yet my phone was bought 18 months ago...worked perfectly until now.
Can a touch screen get defective after normal usage ?
alexandruvlad said:
I have same problem,yet my phone was bought 18 months ago...worked perfectly until now.
Can a touch screen get defective after normal usage ?
Click to expand...
Click to collapse
Yes it can, if your touch functionality of your HD2 has stopped working then your digitizer has probably went out.
T-Macgnolia said:
Yes it can, if your touch functionality of your HD2 has stopped working then your digitizer has probably went out.
Click to expand...
Click to collapse
Yeah,that's what i thought too - but i read some situations where replaced LCD + Digitizers didn't solve this problem.....
alexandruvlad said:
Yeah,that's what i thought too - but i read some situations where replaced LCD + Digitizers didn't solve this problem.....
Click to expand...
Click to collapse
This is usually due to the replacement components not being properly installed. Also when one is working with the internals they have to be very careful as some of the internals are very easy to break without you even knowing you did. So the cases you spec of are more than likely not because it was not the Digitizer or LCD was not the problem, but human error.
i fixed mine and it didnt cost me
the unresponsive screen maybe the digitizer buts its more likey the end call button, believe it or not dirt can get behind the contact or because the back button is next to we use the far edge of the end call button thus leading to bending the contact, when any of this happens your screen will be unresponsive
you can either take it to a shop and pay for a new screen and digitizer or take it apart and clean the contacts
go to ifixit for step by step guides
hope that helps
Intrigued
dgr1983 said:
... buts its more likey the end call button, believe it or not dirt can get behind the contact or because the back button is next to we use the far edge of the end call button thus leading to bending the contact, when any of this happens your screen will be unresponsive
Click to expand...
Click to collapse
I have no idea what are you talking about, that doesn't make sense, as far as I know is no direct relation between END button and (non-working/responding) touchscreen: you may even disconnect/replace bottom buttons ribbon/flex from motherboard and touchscreen will work if OK(or not, if defective).
Is there anybody who can confirm this(or not)?
3 weeks ago I had a LCD/digitizer replaced (cracked screen, but was still working) all was great till 2 days ago. Screen stopped working - took it back to the place I had replace the screen and they tried 3 brand new screens and still no go. Ended up being my main board - luckily I had a spare HD2 and they pulled that board and all is well again.
Believe it or not your LCD/digitizer might be fine - find someone or a way to test main board would be where I would start after the last 3 days.
Good luck
PS - I did NOT try the end button idea prior to the repair.
Zergalot
zergalot said:
3 weeks ago I had a LCD/digitizer replaced (cracked screen, but was still working) all was great till 2 days ago. Screen stopped working - took it back to the place I had replace the screen and they tried 3 brand new screens and still no go. Ended up being my main board - luckily I had a spare HD2 and they pulled that board and all is well again.
Believe it or not your LCD/digitizer might be fine - find someone or a way to test main board would be where I would start after the last 3 days.
Good luck
PS - I did NOT try the end button idea prior to the repair.
Zergalot
Click to expand...
Click to collapse
If still in your possession, I would be interested to buy the motherboard you just replaced!
PM me if interested!
htc hd2 screen died
I also have a 2009 htc hd2 on which screen does not work.
I'd like to know if it's
- a common problem
- is it possible that it's a software (flashing) issue
- can it be replaced and for how much
martinmartiini said:
I also have a 2009 htc hd2 on which screen does not work.
I'd like to know if it's
- a common problem
- is it possible that it's a software (flashing) issue
- can it be replaced and for how much
Click to expand...
Click to collapse
From my own experience :
1. It's a common issue, there are hundreds of reports in this forum and I read them all because I had the same problem some months ago
2. Probably not. It's generally hardware-related and often the digitizer (touch responsive screen) . Brief explanation : There's a flaw in the design of the HD2, the thin cable wiring the digitizer to the motherboard, is just below the power button. After some extensive use of your powerbutton, it might happen that the power button touches the cable and cause some kind of shortcut in it which makes the digitizer unresponsive to the motherboard.
3. I replaced mine here : http://www.htcphonerepairs.co.uk/ . Fast repair, secure shipping to Belgium, good price and excellent customer support. (Sounds like advertizing but I swear to be only a happy customer )
There are also multiple videos on youtube explaining how replacing the digitizer yourself if you dare !
Also, I read answers saying that you can somewhat "play" with your buttons (especially the power one) to turnaround the problem. That's correct, BUT it's absolutely inevitable that the problem with come back again if you use the buttons, and you'll have to force more and more to unblock again and repeat again and a again... and that will damage your button bar.
I did this during almost 2 months and that put down all my buttons and now they are really close to the chassis which is very annoying. If only I knew it before I would have replaced the digitizer directly !
For 6 months with my new digitizer + using ICS with soft buttons, I have no problem at all !
bib*oops said:
I have no idea what are you talking about, that doesn't make sense, as far as I know is no direct relation between END button and (non-working/responding) touchscreen: you may even disconnect/replace bottom buttons ribbon/flex from motherboard and touchscreen will work if OK(or not, if defective).
Is there anybody who can confirm this(or not)?
Click to expand...
Click to collapse
Just because this dude has "no idea" it doesn't mean he knows it better.
It IS the END button that gets pressed too often and at some point it begins to mess with the digitizer connection. It can be dirt. It can just be the cable came lose and needs tightening, it can be wear-out.
whatever it is, it is caused by the end-key being too close to the connector cable.
If you guys only searched for this on the HD2 Forums before posting this Thread hat not been necessary. It is the most well known design flaw of the HD2 and as such well documented and commented here.
Sneakyghost said:
Just because this dude has "no idea" it doesn't mean he knows it better.
It IS the END button that gets pressed too often and at some point it begins to mess with the digitizer connection. It can be dirt. It can just be the cable came lose and needs tightening, it can be wear-out.
whatever it is, it is caused by the end-key being too close to the connector cable.
If you guys only searched for this on the HD2 Forums before posting this Thread hat not been necessary. It is the most well known design flaw of the HD2 and as such well documented and commented here.
Click to expand...
Click to collapse
This is truth. Save yourself some time and frustration and repair it or get it repaired. It's a great phone.
Sneakyghost said:
Just because this dude has "no idea" it doesn't mean he knows it better.
It IS the END button that gets pressed too often and at some point it begins to mess with the digitizer connection. It can be dirt. It can just be the cable came lose and needs tightening, it can be wear-out.
whatever it is, it is caused by the end-key being too close to the connector cable.
If you guys only searched for this on the HD2 Forums before posting this Thread hat not been necessary. It is the most well known design flaw of the HD2 and as such well documented and commented here.
Click to expand...
Click to collapse
You didn't get it right or at all:
END key may determine touchscreen failure along the time(being the CAUSE! of this), but the EFFECT is an unusable touchscreen, which cannot be repaired in any other way than replacing it(the touchscreen!!, I mean).
Any other attempt to repair, clean, bend, press, cut or whatever WILL NOT FIX an already faulty touchscreen (even caused by END button excessive or not usage) and who thinks otherwise, no problem with me: SWEET DREAMS!
You sound like my comment hurt you. Sorry if it did. I'm not one hundred percent sure that this issue can be fixed without replacing the screen, yet fairly certain. I've now disassembled two HD2 and couldn't quite find the precise spot where the damage occurred, yet after properly assembling the devices again, one came back alive, the other not. The one which has the screen and buttons not working right is the one that got thrown at me by a kind person. It most likely has physical damage somewhere, although I couldn't locate it. The other one didn't get damage and has screen and buttons work well after complete disassembly and assembly.
Both devices also have different screen types.
I now gave up both devices and am withdrawing myself from the HD2 world. Too many issues with the devices getting old.
sent from the tip of my finger

[Q] capacitive buttons

Hi, I know there are other post related to this same issue, I've searched the forum, but haven't been able to find what I'm looking for.
The four capacitive buttons on my Desire Z have suddenly stopped working, and I'm 100% certain it's a hardware fault, because the problem remained after restoring old backups, and also wiping and flashing another rom. The problem I've got is that I not sure what the part I need is called because a search for capacitive buttons on ebay turns up nothing.
Does anybody know what part I need or where I could find one.
Thanks in advance.... ...John...
j0hn0n1 said:
Hi, I know there are other post related to this same issue, I've searched the forum, but haven't been able to find what I'm looking for.
The four capacitive buttons on my Desire Z have suddenly stopped working, and I'm 100% certain it's a hardware fault, because the problem remained after restoring old backups, and also wiping and flashing another rom. The problem I've got is that I not sure what the part I need is called because a search for capacitive buttons on ebay turns up nothing.
Does anybody know what part I need or where I could find one.
Thanks in advance.... ...John...
Click to expand...
Click to collapse
Just the button area? Or the entire screen?
Note that the hardware you are looking for is called a DIGITIZER.
HOWEVER, you should also note that the capacitive digitizer, being CAPACITIVE, requires that you make a solid electrical contact between the glass and the phone's body (static charge transfer, capacitor discharge). Try moistening your hand a bit, try holding it in your other hand (I find that it is hard to make a good contact in my LEFT hand, but works great in my RIGHT). Try cleaning the digitizer with rubbing alcohol.
Just the Buttons, I was thinking that if it would have been the Digitizer then it would of affected more of the screen, what I think I needed was the little strip that holds the four buttons and trackbutton thing.
It's all right anyway, since I wasn't really sure what I was looking for I handed into a repair shop about an hour ago. I usually prefer to repair things myself, but I wasn't really sure where I could buy a whatjamacallit or a thingamibob. .
Thanks anyway.. ....John...
The capacitive home button on my Streak 7 died due to static shock. I'm surprised this doesn't happen more often since the phones are always in a pocket.
here ya go
http://www.ebay.com/sch/i.html?_fro...13&_nkw=g2+trackpad&_sacat=See-All-Categories

Power & Volume buttons are very difficult for Pressing, Solution ?

Hi,
I owe a Nexus 4 since Nov. 2013, purchased from Play Store.
I noticed that the buttons began to behave very weired recently.
The power and Volume Down buttons are tricky, and when pressed lightly as before they don't produce any response. I have to press them hard.
It started a week ago, and deteriorated very fast.
I use the phone with Ringke Fusion case from day 1, Which is water sealed and the buttons don't get any water. And didn't drop it.
It might be cheap material of the phone.
Now what is the solution ?
Are buttons covered under warranty ?
Should I use an alternative apps and Kernels (S2W, D2W)
or should I fix them at a local shop ?
Thanks very much.
it seems hardware problem... contact lg service center....
parveen75 said:
it seems hardware problem... contact lg service center....
Click to expand...
Click to collapse
Already did
I should send the device to the country where I purchased it . USA
aymnahmd said:
Already did
I should send the device to the country where I purchased it . USA
Click to expand...
Click to collapse
there is no lg service in ur area??? it costly to send mble to another country???
Same thing happened on the power button of my N4. Correctly working -> tricky -> doesn't work
If you are ok with it (risks, warranty lost, ...), you can try to fix it by yourself, as i did.
Remove the back cover (2 T5 Torx screws), then remove the black obtrusive plastic frame covering the motherboard (fixed by >10 screws)
Now you should be able to access the different buttons.
When removing the non/hardly working buttons, you should be able to see the connectors on the button (the ones making contact with the motherboard) more or less crooked. Just straighten them in order to make them touch correctly the motherboard during pression.
Hope this helps.
I had the same problem and after removing back cover problem was solved.
Same problem here. My buttons are very hard to push sometimes, but man...I am experience in computer hardware and stuff but I am somehow not confident enough to srew off my phone... :/

Is this LCD problem?

Okay, a couple of days have been past now. I was using my phone back then, playing a game and then suddenly the notification led lighted blue and then the screen turned black. But it's still working. I thought it got hanged out or empty battery but it didn't show the samsung logo. So I restarted it. It started and I can unlock the lockscreen but it's all showing black screen. Can't see anything. Menu, home, power, volume and back buttons are all working.
I brought it to phone repair centers and they all said it was LCD problem and I need to pay for like $100(converted) for a new LCD. Are they saying the truth or I can still resolve this?
Yes, there seems to be a physical problem.
I cant say if its the LCD itself, or a cable, or a conector, or the graphics chip on the board. But yes, it seems to be a hardware issue.
If you are able to work on stuff like that, open the phone yourself, clean the board with Isoprophyl, clean the connectors and put it back together.
Maybe that will already fix it. If not, let them take a shot.
If you are not sure about that procedure, there are a lot of videos on youtube showing you how to dis- and reassemble an S4.
First things first, Hi
Second, Only the S4 Active has an LCD screen, the others are AMOLED.
Third, You say that all the keys are working. Are you basing this on the touch sounds, or are the any visual indicators?
what reaper said... if you go ahead and get it repaired insist that you get an AMOLED panel and not an LCD, you'll regret it if you don't...
GDReaper said:
First things first, Hi
Second, Only the S4 Active has an LCD screen, the others are AMOLED.
Third, You say that all the keys are working. Are you basing this on the touch sounds, or are the any visual indicators?
Click to expand...
Click to collapse
yes. ui touchpad works, volume buttons, power and home. i can hear the lockscreen being unlocked when i swipe it after being locked.
it's just the screen is all black.
Backe888 said:
Yes, there seems to be a physical problem.
I cant say if its the LCD itself, or a cable, or a conector, or the graphics chip on the board. But yes, it seems to be a hardware issue.
If you are able to work on stuff like that, open the phone yourself, clean the board with Isoprophyl, clean the connectors and put it back together.
Maybe that will already fix it. If not, let them take a shot.
If you are not sure about that procedure, there are a lot of videos on youtube showing you how to dis- and reassemble an S4.
Click to expand...
Click to collapse
that's what i'm guessing but i let them use my phone and see the problem and they all said LCD considering it's amoled yeah. I may try that but i need tools to open it like small screw etc..

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