Database Users

optical joystick problems

i bought my incredible used about a month ago and i noticed that occasionally when im using the optical joystick and im scrolling down sometimes it will just start to scroll up, even after i move my finger away from it. also sometimes it will randomly keep trying to scroll up uncontrollably.
i was thinking that this possibly has to do with my screen protector, is still brand new and has been on the phone since before i even bought it. but my question is if it is worth wasting a perfectly good screen protector to find out if its causing the optical joystick to do this? and i have no idea how to even remove the screen protector because i have been trying to pull it off for a while now and no luck.

xmetl said:
i bought my incredible used about a month ago and i noticed that occasionally when im using the optical joystick and im scrolling down sometimes it will just start to scroll up, even after i move my finger away from it. also sometimes it will randomly keep trying to scroll up uncontrollably.
i was thinking that this possibly has to do with my screen protector, is still brand new and has been on the phone since before i even bought it. but my question is if it is worth wasting a perfectly good screen protector to find out if its causing the optical joystick to do this? and i have no idea how to even remove the screen protector because i have been trying to pull it off for a while now and no luck.
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The track pad being dirty can cause this, I usually just wipe it with my shirt and it's fine.

setexascustoms said:
The track pad being dirty can cause this, I usually just wipe it with my shirt and it's fine.
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i tried that, many times. nothing worked. and by the way it doesnt even do this all the time, it only will occasionally start to do this.

xmetl said:
i tried that, many times. nothing worked. and by the way it doesnt even do this all the time, it only will occasionally start to do this.
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Click to collapse
That's all I know to do, sorry I couldn't help.
Sent from my ADR6300 using XDA App

It may be a coincidence, but I used to periodically (once or twice a week) have my optical pad start drifting or go out of control. In the month or so I've dropped HTC Sense and been running Cyanogen ROM, it hasn't happened a single time.

This happened to me before and they just sent me a new phone.
Got the new phone and never happens.
I researched a while back and this is somewhat common with the incredible.

[Q] G2 Screen Issues

Hello,
I've been having touch screen issues lately, since i rooted and switched to CM 6.1 a couple of weeks ago. The screen will work perfectly for a little while, but will inevitably stop responding. I'm using launcherpro, though i don't believe that's the issue- it happens regardless of which launcher I'm running (I've tried others and experienced the same issue. The optical scroll pad will still "sort of" work- better than the screen (which will respond to the occasional touch after the problem begins, but barely does). If I reboot, the problem will usually go away for a while again, but will recur. I wind up needing to fix the issue once or twice a day. I don't think it's a hardware problem because the reset fixes it, so I assume it is then software. Also, i don't remember having this problem with the stock rom. Has anyone else experienced this, or does anyone have any ideas?
Thanks!

Dunno how useful this will be, but have you tried reflashing CM?
Sent from my T-Mobile G2 using XDA App

Same problem here. But I've noticed sometimes if I'm using the phone not in my hand (on car dock or just on table) this problem seems to happen more...but when I hold it in my palm then works fine.
But sometimes it just becomes unresponsive. Am running virtous's rom on my g2. But I can remember having the same issue when running cm on my g1 days too. Reboot always fixed it, just gets annoying.
Anyone have fixes to this? Thanks!!
Sent from my HTC Vision using XDA App

I personally use GV 7 or sparksmod and. Never had a problem, these are the best roms I think for this phone.
Sent from my HTC Vision using XDA App

Been having this exact problem for weeks now. And I believe it is a hardware problem, probably some sort of short in one of the ribbon cables or the digitizer itself. Occasionally, actually 85% of the time I'd try to open an apparently and the phone would act if I held my finger down and then the apparently icon gets selected...very annoying cus it happens over and over a couple times, all I can do is keep trying until it does what its supposed to. Also with the on screen keyboard when I'm texting it'll act like I'm holding down on one of the letters and keeps bringing up the special characters to that letter...or ill tap delete to delete a spelling error and it'll end up holding it down and deleting my whole damn text and I can't stop it.
At first when this first started happening I could simply tap the screen and it would stop the crap it was doing and work fine. As time went on I noticed I kept having to hit it harder and harder for it to correct it. Wellllll guess what? Last night it was acting up horribly and I slammed my closed hand against it while it was on the desk and it cracked the LCD screen and now the phone is completely useless, even though the outer touchscreen is perfectly fine.
The restarting of the phone also usually fixed it for me as well but only for a few minutes.. which also makes me think its a short because after the phone is turned off whatever part is shorting out, that circuit is closed and just takes time until you press on the screen in whatever spot to cause the two parts to touch and create the short all over again.
Anyways that's my story...just don't get angry and slam down on the screen lol. This is my 2nd G2 and I'm tired of it, probably just going to get a nexus s or just go back to the nexus one, atleast it was reliable.

huh28 said:
Same problem here. But I've noticed sometimes if I'm using the phone not in my hand (on car dock or just on table) this problem seems to happen more...but when I hold it in my palm then works fine.
But sometimes it just becomes unresponsive. Am running virtous's rom on my g2. But I can remember having the same issue when running cm on my g1 days too. Reboot always fixed it, just gets annoying.
Anyone have fixes to this? Thanks!!
Sent from my HTC Vision using XDA App
Click to expand...
Click to collapse
if you open the battery cover u can see that there are connectors that closes the whole circuit, so when u are holding the phone the back cover works like a grounding area that makes the screen responce to your touch. Acapacitive screen works like this: when you touch in any area on the screen, you simply are breaking the electrical field that the screen has, the screen "feels" where u break it and tells the operating system.
the electrical field depends on the human body a bit to make the circuit complete, so when u touch the metal parts of the phone, the screen works like it is designed.

Screen sticking

Anyone else having a weird, intermittent issue with the touch screen seemingly not working right
IE: I try to scroll and instead it makes a tap where my finger lands. Unlocking the screen doesn't work 50% of the time because the lockscreen will just lag out and I have to sleep/re-wake the device
This happens on stock and after i rooted to tiamats rom

XFreeRollerX said:
Anyone else having a weird, intermittent issue with the touch screen seemingly not working right
IE: I try to scroll and instead it makes a tap where my finger lands. Unlocking the screen doesn't work 50% of the time because the lockscreen will just lag out and I have to sleep/re-wake the device
This happens on stock and after i rooted to tiamats rom
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Click to collapse
I haven't experienced or heard of this before, at least as you're explaining it.
Is this accompanied by screen dimming? Did this start after the update to HC3.2?

okantomi said:
I haven't experienced or heard of this before, at least as you're explaining it.
Is this accompanied by screen dimming? Did this start after the update to HC3.2?
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I use auto brightness, but I do not notice it changing during this happening
I got my XOOM with 3.2 on it

Your device may not be grounded. It's a common problem with touch screen devices. Does this happen when you're holding the device in your hands?

zehkaiser said:
Your device may not be grounded. It's a common problem with touch screen devices. Does this happen when you're holding the device in your hands?
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I really don't know, let me do some testing and see what circumstances it is replicated under.
How would grounding be determined? Its not charging...
I do have it in a silicon/rubber case. Would that be a problem?

Just for the sake of satisfying my curiosity - if you are experiencing this issue while your Xoom is docked - try placing your fingers on the back of your Xoom and typing with your thumbs.
I am trying to resolve a similar issue that I only encounter while my Xoom is docked at one place in the world - my work. Nowhere else does it do this.
I have installed a power conditioner, with no effect. It happens whenever the power is plugged into the dock. If I use an external power supply it goes away (batteries). I did switch off the florescent lighting and it is better, so it may be EM related. especially since it is a *capacitive* screen.
I have also read of people with other capacitive touch screen devices have the same issue when it is not held in their hands.
Let me know either way.
Thanks,
Frans

XFreeRollerX said:
Anyone else having a weird, intermittent issue with the touch screen seemingly not working right
IE: I try to scroll and instead it makes a tap where my finger lands. Unlocking the screen doesn't work 50% of the time because the lockscreen will just lag out and I have to sleep/re-wake the device
This happens on stock and after i rooted to tiamats rom
Click to expand...
Click to collapse
I have seen issue on gtab where some roms/kernel where having issue with screen calibration, there was a calibration files that could be created in the root with the name calibration.ini and upon reboot it was fixed, I do not know if this is valid for a xoom tho...
with a few rom I had NO issue whatsoever and never reused the calibration...

fransdw said:
Just for the sake of satisfying my curiosity - if you are experiencing this issue while your Xoom is docked - try placing your fingers on the back of your Xoom and typing with your thumbs.
I am trying to resolve a similar issue that I only encounter while my Xoom is docked at one place in the world - my work. Nowhere else does it do this.
I have installed a power conditioner, with no effect. It happens whenever the power is plugged into the dock. If I use an external power supply it goes away (batteries). I did switch off the florescent lighting and it is better, so it may be EM related. especially since it is a *capacitive* screen.
I have also read of people with other capacitive touch screen devices have the same issue when it is not held in their hands.
Let me know either way.
Thanks,
Frans
Click to expand...
Click to collapse
Well you bring an interesting point. The device was in my hands but I was not actually touching it... It had a rubber sleeve on it.
I since got the Motorola hard case which has some areas exposed and I also disabled the lock screen, and I have not been able to replicate the problem at all.
The device was docked at one point, charging, and the problem showed up aagin (recalling from memory). The fix was to power off the screen and re-wake the device. This did involve touching it, so...maybe its an electrical thing?
P00r said:
I have seen issue on gtab where some roms/kernel where having issue with screen calibration, there was a calibration files that could be created in the root with the name calibration.ini and upon reboot it was fixed, I do not know if this is valid for a xoom tho...
with a few rom I had NO issue whatsoever and never reused the calibration...
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Click to collapse
I had this problem with the stock 3.2 ROM. I haven't done any calibration, and don't think I need to: it works perfectly majority of the time.
I'll reenable the lockscreen and try to replicate it again.

Okay I think I'm onto the problem
I opened the case just now, still lock screen disabled, pressed just the power button and the touchscreen was acting up again.. couldn't slide to scroll, but could tap/point only
I then put my thumb on the side, as if naturally holding it without a case, and it started working normally again without any kind of power cycle.
Thoughts?

Have you dropped or jarred your Xoom a lot? Look for threads I started in this forum, I have one that explains this issue and includes a fix. My Xoom is still working flawlessly. I'd link it but pre-calculus is about to start.

Elysian893 said:
Have you dropped or jarred your Xoom a lot? Look for threads I started in this forum, I have one that explains this issue and includes a fix. My Xoom is still working flawlessly. I'd link it but pre-calculus is about to start.
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Click to collapse
http://forum.xda-developers.com/showthread.php?t=1068499

I bought the XOOM second hand from someone who claimed they hardly used it. Right now sitting infront of me, the bottom right, on the back edge, there is a small pressured crease as if it was dropped (looks like the corner of my phone when i dropped it on tile).
I personally have not dropepd it, but I throw this thing onto my bed all the time, it fell out of the dock onto my hard desk once, so yeah its been knocked around.
Will doing that mod void the warranty?

I found no warranty stickers or screws when I disassembled it. The back cover is made to slide down so that Moto can do the 4G upgrade, so I doubt they want to be fooling with that type of thing anyways. I can't say for certain that sticking a piece of foam in the back of your Xoom won't void the warranty, but I can say that it fixes the issue(which also could be covered by warranty if you can get someone to believe you've got the issue, I however could not, so I had to take it upon myself).

Alright
I just ran into the problem again playing a game.. seemed like the right half of my screen just stopped working intermittently. Kept playing and it returned to normal.
I may pop it open and try the foam thing. I'm pretty good with disassembling laptops.. I can't see this being much harder.

Screen Fault... ghost typing

Im having issues with my phone, where it starts typing and doing screen presses without me doing anything.
very similar to the youtube video "ghost typing" 3rd one down
(wont allow me to post external links lol)
as this must be hardware issue, it does seem like a cable might not be all the way in correctly? has anyone seen this before and can you offer me any advice on repairing it?

Try to flash a different kernel.
Sent from my Nexus S using xda premium

-
Try flashing a new kernel first, which one are you using right now btw?
btw used to happen on my old phone if the screen was wet for some reason :O

hi, thanks for the reply,
currently using
2.6.35.7-gf5f63ef #1

This was happening alot when i first got the phone, usually when the screen was dirty or had some moisture on it like someone said earlier. Locking and unlocking it usually helped, also try cleaning any dirt off the screen.

clean your screen
also, you experience this kind of issue when charging or using battery?
sometimes, a bad charger or unstable power will make capative touch screen strange

Can this G2 be saved?

My phone seems to be working fine, but it is hard to tell since the screen usually won't turn on. I say usually because once or twice a day I can wake the phone up and the screen will work, but as soon as the screen turns off again it usually won't come back on.
I am wondering if I wipe the phone back to stock if that might make it work like normal again, but my question to you is, Can I restore the phone to its original state without using the screen? Every time I try to boot to recovery or bootloader the screen stops working and I am stuck. Can I use ADB to do everything? If so, I need to know the commands to type in.

Is your ribbon cable loose?
Sent from my SGH-T989 using xda premium

It doesn't appear to be. Is there a good way to check?

Same problem I had. Sent it back to HTC and they fixed it free
Sent from my HTC Vision using XDA

Will they fix a phone that is rooted with CM7 on it?

loomism2 said:
Will they fix a phone that is rooted with CM7 on it?
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Click to collapse
I followed a PDF a member called strawmetal made, didn't need the screen, returned it to stock and sent it in
Sent from my HTC Vision using XDA

My phone also has a problem that sometimes appears.
Sometimes, the screen won't turn on at all. I would use the phone normally and lock the screen. Then, all of the sudden, when I pick it up again it wouldn't turn on at all, it's like it shut down.. After pressing the POWER button, it reboots and then works.

I am still thinking this is a software glitch rather than a hardware problem. The screen came on the first try this morning and I went into Our Groceries to add something. When I backed out of it the screen turned off, and hasn't come on since. Also, last night it was also working and I went into settings to lower the screen brightness. No matter what I set it to it stayed the same, and the Auto setting was unchecked. I think I need to just reflash the rom but I don't know how to do that without the screen being on.

Some phones have problems handling low voltages in sleep mode if you have underclocked it. On one of my g2's i had to 384mhz or something like that for the screen to turn on.
I think it was the underclocking, not shure. But something with the screen voltage
sent from phone

If all else fails, flash it to a stock rom. Try to make sure all the overclocking features are turned off. Try finding a rom that's just a clean and rooted stock rom. Do that first, then if that doesn't work then flash to stock.
Remember overclocking isn't for every chip on every phone. Not all chips are made equal, and some can be amazing at overclocking or under volting and some not at all.

That is what I am wanting to do, but how do I do that without being able to see the screen? Every time I boot into recovery, or even bootloader, I have no screen to see what I am doing.

loomism2 said:
That is what I am wanting to do, but how do I do that without being able to see the screen? Every time I boot into recovery, or even bootloader, I have no screen to see what I am doing.
Click to expand...
Click to collapse
If you can't see the screen even in recovery then it must be hardware. You might have damaged the flex cable to the LCD+digitizer. You can try to flash it to stock with HTC's tools. I remember doing it to my phone without needing to touch it at all. So long as the phone is on and charged, you should be able to do it. Just do a quick search on the forums, but make sure not to flash a rom that you can't root.
You can get it on Ebay for $26. They sell them with tools for a bit more if you don't have the tools.
http://www.ebay.com/itm/HTC-Desire-...019?pt=LH_DefaultDomain_0&hash=item1e67ead4c3
Here's the flex cable with tools.
http://www.ebay.com/itm/USA-Main-Fl...758?pt=LH_DefaultDomain_0&hash=item2c65ba56ce

Wow. So the cable is actually user replaceable? I guess I need a YouTube video or something to show how it's done. Of course, my screen works SOME of the time, so I don't know if I have the guts to perform this type of surgery without a viable backup plan if something goes wrong. This looks like something I would try after I have a suitable replacement phone already. Still, I find it impressive that this part is so easy to find! Thanks for the links!

If you decide to replace the ribbon, go ahead and replace the hinge spring as well, worked wonders for my G2.

i replaced the screen ribbon and the spring at the same time.
it wasn't too hard. takes about 15 - 20 minutes to do it the first time.
you can buy the entire ribbon assembly for pretty cheap. just be VERY careful with the USB/SD card ribbons on the side of the main board. one is a clip, the other is a pull tab. if u dont know which one is which- the phone will not have SD card capability when you break them :-(

loomism2 said:
Wow. So the cable is actually user replaceable? I guess I need a YouTube video or something to show how it's done. Of course, my screen works SOME of the time, so I don't know if I have the guts to perform this type of surgery without a viable backup plan if something goes wrong. This looks like something I would try after I have a suitable replacement phone already. Still, I find it impressive that this part is so easy to find! Thanks for the links!
Click to expand...
Click to collapse
This is the dirty secret of smart phones, in that nearly everything is replaceable, and usually for cheap.
Damaged the phone physically = housing = $60
damaged screen = lcd + digitizer = $50
Even the speakers are like $3, and I know cause I had to replace mine. The only thing that'll make you want to throw the phone away is if the main board or logic board is damaged. Even then you could probably find a broken phone that at least has a working board for cheap. I actually bought a $15 broken G2 that I plan to repair and give it to my sister as a gift. I have enough spare parts to make it work.
As for changing it, there's plenty of guides on how to replace the digitizer on YouTube. You have to replace the cable to get to the lcd+digitizer, so just follow the video up to that point.
http://www.youtube.com/watch?v=u-dR8CHEGjY

I have an issue with my screen. It is blank or grey or white lines. The phone works, just cant see the screen.
Anyone know why? Does anyone have a link to disasemble the G2?
Sent from my Transformer TF101 using xda app-developers app

hipertec said:
I have an issue with my screen. It is blank or grey or white lines. The phone works, just cant see the screen.
Anyone know why? Does anyone have a link to disasemble the G2?
Sent from my Transformer TF101 using xda app-developers app
Click to expand...
Click to collapse
here is the like to disasemble the G2
http://www.youtube.com/watch?v=u-dR8CHEGjY {thanks to @Dukenukemx }

I just wanted to say Thank You to everyone who helped me on this. I bought the ribbon, watched the YouTube video, and now I have a working phone again! $25 sure beats $350 for a new phone, and it was more fun , too.
Now my screen has trouble displaying colors with gradients. It looks like it isn't showing all the colors, so there is a weird muddy area between the dark and lighter portions, sort of like playing an old Sierra computer game from the 80's. Did it revert to only showing 65k colors instead of millions? Still, not a deal breaker in any way. The phone works and i couldn't be happier!