Database Develop

Tilt screen not rotating and keyboard lighting up.

I just got a 2nd hand htc tytn2 today and for some reason when I slide the keyboard out it does nothing. When on the basic today screen the screen doesnt even light up! Any ideas how to fix this guys? I even went as far as flashing a cooked rom to see if its software related but hasn't made a diff. PLEASE HELP as I love my new tytn2 but whats the use if the keyboard doesn't work!

Hopefully all it is is that the cable connecting the keyboard is loose -- you'd have to search these forums for some instructions on how to take it apart and check the cable.
EDIT: or perhaps more likely is that the magnetic sensor is broken.

Man this stinks. Was really looking foward to this tytn as well. Not looking foward to taking it apart and somehow finding a replacement sensor .
Oh, by the way, the keyboard works fine, the phone just doesnt react to the slide at all

OK -- if that's the case then the most likely culprit is the magnetic sensor.
Unfortunately, I seem to recall reading on these forums that it's not easy to change. There could be a missing magnet on one side -- if you take a magnet and wave it around the phone, see if you can get it to switch to landscape mode. If it does, then that's better news -- you just have to replace the magnet to get it to work.
If not, then the sensor is broken...
Can you send it back because it's not in complete working order?

G1 Keyboard Backlight

Hey folks,
Just a quick question for anyone that would know. Does anyone have any idea where the keyboard backlight is located within the G1? I have the service manual but it doesn't say anything about the keyboard backlight. Mine has not worked correctly for months (blinks/stutters on and off or stays off completely) and it's a pain to use the kb w/o the backlight.
I'd like to see if there's a torn ribbon, or a wire that's not making contact, to try to fix it, but I need to know where exactly inside the phone is the light. Anyone that can help, I'd really appreciate it.

Anyone? Bueller??

I guess EVERYONE'S keyboard backlight works fine eh?

If its defective why not send it back in to T-mobile?
Also, there may more than one light.

I'd imagine it's a series of SMD LED's.. if the whole thing flickers it could be a damaged ribbon, but if only one side flickers its probably a dry solder joint or something.. you haven't got much hope of resoldering an SMD LED if that's the case.

[Q] Repairing/assembling G1 -> broken volume rocker and touch panel

Well, I fixed my old broken G1 with new screen, touchscreen panel, case and keyboard.
Now I have 2 issue:
1) Sometimes my touchscreen goes grazy!! If I use the touch test application I see that sometimes when I touch the screen in an area there is another virtual touch in another zone of the screen. I read that it can depend from the current source when I charge the phone.. but I'm going crazy!! I opened my phone 10 times (I thought there was a problem in the cable that link TouchPanel to LCDPanel, because when I lock the cable with the clip it tends anyway to go out from the connector, now I put some scotch tape to fix but the problem is here.. so I think is another problem).
2) My volume rocker doesn't work!!
I bought 2 new keyboard to fix this problem, but no one of that fixed the problem. I thought the first new keyboard had volume keys broken, so I bought another one, but the problem persists!!
Now the Touch problem rarely happens, but the volume rocker is completely unusable..
Someone have experience about G1 assembling/repairing ?
Thanks and sorry for bad english

if you have put in multiple keypads have the same issue i would assume that it is the connection going to the motherboard. just a guess there but its either that or you have had a bunch of faulty keyboards.
only other thing would be a software problem
does the keypad work in recovery (let you go up down throughout the list) ?
as for the touch screen, probably need a new digitizer or flex cable, both are cheap and it sounds like you have the knowhow to replace them.

Ok, but digitizer is new!! screen also is new, and I have bought a total of 4 flex cable because I see that they are fragile (I broke the first I bought).
I tried to change flex cable but the problem remain the same.
The only thing that can be damaged is the LCD cable that links to the flex cable: it has a small cut where the cable have a curve, but the cut don't reaches the contacts (the cable is transparent). I also use some glue and scotch tape to mantein lock the cable.
The digitizer cable is connected to the LCD cable, and then they go to the flex cable that connect them to the motherboard.
The strange thing is that seems a software issue, because if I turn off and than turn on the screen, the problem is fixed for some seconds, minutes and sometimes hours...
Another strange thing is the possibility to control the screen with some metal objects from the moment that the virtual touch problem appear (I can control the screen also without touch it, with hand and piece of metal)
video:

have you tried a factory reset if you think it may be a software issue? if that dosent work you can try install a whole new rom.
really it sounds like it isnt the hardware since you appear to know what youre doing. i have a had a few phones that had screen (digitizer) issues and a new rom flashed cured it just fine
since you dont mind putting a few dollars into it, and your familiar with the inside, you can always try to pick up a cheap motherboard or spare phone from ebay or what have you, then swap the motherboard and you could then hopefully find out if it is the hardware or software

nagash91 said:
Another strange thing is the possibility to control the screen with some metal objects from the moment that the virtual touch problem appear (I can control the screen also without touch it, with hand and piece of metal)
Click to expand...
Click to collapse
Huh sounds like you got a cheap digitizer than. Most good digitizers use heat to touch. If it's literally touch, then sounds like its a fake/meh digitizer. i hate the digitizers that aren't heat, but press. I see them all the time in those first samsuck touchscreen phones. And they usually die in a bit. I had a Samsung behold with a screwed up digitizer

demkantor said:
have you tried a factory reset if you think it may be a software issue? if that dosent work you can try install a whole new rom.
Click to expand...
Click to collapse
Yes I flashed 3 or 4 roms after a wipe (I tried also super-wipe.zip), but the problem is here..
The digitizer works well some times, but sometimes get crazy (you can see in the video).
I don't that my new digitizer is fake, but I really don't know!
BTW I'm trying to repair my phone for fun (now I have desire z) and because I am fascinated by my old G1.
PS:
I see another strange issue--
If I touch the screen when the phone is on a table the screen digitizer is not very sensitive and can't take input from fingertips.
If I touch the screen when the phone is in my other hand, the screen digitizer is a lot more sensitive and it take input from fingertips.
My impression is that there is an electric field or something similar that disturbs the digitizer, and when I take the phone in my hand I discharge that field to ground. Also when I turn off the screen, seems that the electric field discharge so when I turn on the screen is ok, but after some seconds the field returns to disturbs the screen.
I really don't know, but is the impression that I have.. something that is not shielded.
Now I'll try to use my phone in airplain mode.
Thanks guys, I'm happy to see that this forum is still very active

Backlight problem after replacement

Hello everyone,
I have got one problem... I broke digitizer of my HTC Desire 500. So I order new one and to be sure, also LCD screen. I replaced, and...
After turning on, everything works fine. Digitizer works properly, screen shows normal picture. But after few minutes - restarts (I don't remember well) backlight of my screen goes down and now it have no backlight at all. I rebooted phone many times, I remounted screen and digitizer to be sure that connections are fine - but no results. I restored factory settings of phone with no effect too. :/
Please help, what happend? What could be the source of problem? I don't want to order new sceen if it could beak too ;/ I read other threats about coil problem in other HTC, but I cannot find any coil in my Desire's motherboard (maybe it is hidden under plate that covers CPU and other parts). I performed tests of light sensor and it works fine. Buttons lights fine too. The problem refers only to LCD screen, and backlight doesn't respond during test.
Anyone help?

same situation
Hello kowal_luki,
I'm just in the same bad situation.
After a bad fall of the phone the screen broke so I ordered a new one for replacing it.
Opening the phone I noticed that also the LCD (and not only the external screen) was broke so had to order also the LCD.
As precaution tried to power-on my device without a complete assembly and everything seemed to be fine, so I decided to glue the LCD to the outer screen (the touch screen) with a LOCA TP-2500 glue.
Then I re-assembled it up: at first the image was a little bit disturbed but the back-light was working; after few second the back-light turned off. I checked the cable, after that the image went perfect but the back-light still dead.
Did you find a solution for this -still not explanable- problem?

Problem after screen replacement

I've got a replacement screen that my friend had in his house. Mine was broken (both the display and the digitizer, the latter was acting very weird). I did the replacement myself, and when I was finally done, I noticed something. The Touch Screen wasn't working (I could see the image but no input was recognized). I tried opening it and checking every single cable to see if there was anything wrong, but there was nothing looking broken or out of place. When I was going to test it, I noticed another very weird thing. It actually works if I keep the back of the phone off (not the back interchangable cover, I mean the back of the phone that is screwed in place). The problem is that this phone has a very annoying design that makes it so the Wi-Fi, Speakers, Camera and some other stuff don't function well with the back plate off, speacially the Wi-Fi.
I trully have no idea what is happening or what is causing the problem with the touch screen, and have no idea why the back plate makes the screen act funny. Can someone please help me figure this out?

Perhaps something in the digitizer's flex cable is shorting with the back panel. Try putting a layer of electrical tape between the flex cable and the back panel.