Database Users

Is this the forum for repair advice? Digitiser recalibration

I dropped my phone and the screen now doesnt respond properly: The hardware DID successfully upgrade to the XDA ROM. But touching it causes the backlight to go on, - but most of the keys dont do what one would expect them to do: The phone turns on with a reminder from the calendar on the screen which wont DISMISS or CLOSE. Pressing on the windows logo and then on the phone key causes the calendar to come up and I am not sure which numbers are entered when I do manage to get the phone to come onto the screen (none of the right hand numbers seem to work at all). Does anyone recognise these symptoms and/or could they just show that my SX-56 needs the ROM RE-flashing? I should add that pressing the Master Reset button with this ROM in place seems to make the phone shut off and then when you restart it, all of the data remains in place. I wonder if there is any possibility that the XDA ROM has prevented the reset button from working normally?
A user on another forum said that to him, '"Sounds like the digitiser is up the swanee - have you tried recalibrating it?"
10-12 vertical black lines started appearing to the right hand edge of the screen. Sometimes they are there, sometimes not. THere is usually at last one there somewhere. At about that time the screen stopped responding as I mention. Today the left third started displaying the same veritcal lines, though spaced quite far apart (about a millimetre). Screen doesn't APPEAR cracked: Does this sound like a digitiser and if so, how do you recalibrate it please or is there a link to somewhere on the XDA site which I cant find which might tell me? Or could it be the cable is loose in the circuit board? As you touch the lower right hand corner of the metal casing where the vertical lines are, those lines flash (the right 10 or 12) on and off. And every coloured bar everywhere on the screen or word of text has vertical lines on it (the white parts don't)??
Someone on ebay has said that his phone "fell from my pocket and onto the carpet and the screen cracked, I then used it for about a week" "I sold the screen to someone cause the wanted the touch pad part of the screen for there phone". and wonder what it was he sold or which part can be replaced on it? IS there a touch part and a screen part on this phone?

To be honest, itsounds like you have brocken a connection somewhere between the LCD and the gfx output, probably not possible to repair yourself.

I wonder where the break would be?
I thought that might be the case: I wonder if it would be worthwhile trying to get another screen?
I should probably try to take the unit apart and see if some break somewhere can be identified if it is a break as opposed to some electonic part having failed. It SEEMS to be in the lower right hand corner?

Display Problem: it's flickering...HELP!!!

Hi all,
I think my display has a problem of flickering: I noticed it going to "system status" window by clicking on battery, or signal icon. Here you have a gray stripped background that on my display seems to be unstable...something like flashing. I have the same impression if I look at the headers stripes of the tabs, where you find, "People", "Messages" etc...
The strange thing is that what ever I see, pictures, different windows, they all seems to be very stable, no flashing...flickering...problem.
Now I ask to myself, could it be an optical effect due to the pattern of that specific background?
I make the same answer to you all...and did somone notice the same problem?
Please answer me becouse I should have to replace it if I really have this trouble...
THX so much!

asci said:
Hi all,
I think my display has a problem of flickering: I noticed it going to "system status" window by clicking on battery, or signal icon. Here you have a gray stripped background that on my display seems to be unstable...something like flashing. I have the same impression if I look at the headers stripes of the tabs, where you find, "People", "Messages" etc...
The strange thing is that what ever I see, pictures, different windows, they all seems to be very stable, no flashing...flickering...problem.
Now I ask to myself, could it be an optical effect due to the pattern of that specific background?
I make the same answer to you all...and did somone notice the same problem?
Please ask me becouse I should have to replace it if I really have this trouble...
Click to expand...
Click to collapse
Did you try a Clear Storage followed by a Hard Reset?

@tnyynt
Thank you for your replay.
Other people suggested it to me. I've tried it right now and it had no effect, I'm still having the same problem.
BTW: Clear Storage performs by itself a HardReset after typing 1234...am I right?

I too am noticing this flickering on the top bar. I couldn't work it out. No idea what it is, but quite glad I'm not the only one with it. No idea if it is an illusion or a fault though. Can anyone else confirm?

asci said:
@tnyynt
Thank you for your replay.
Other people suggested it to me. I've tried it right now and it had no effect, I'm still having the same problem.
BTW: Clear Storage performs by itself a HardReset after typing 1234...am I right?
Click to expand...
Click to collapse
Yes, you are right, but it's a different one than the normal Hard Reset.

Try to change brightness of the backlight, for example turn it off and check then.

asci said:
Hi all,
I think my display has a problem of flickering: I noticed it going to "system status" window by clicking on battery, or signal icon. Here you have a gray stripped background that on my display seems to be unstable...something like flashing. I have the same impression if I look at the headers stripes of the tabs, where you find, "People", "Messages" etc...
The strange thing is that what ever I see, pictures, different windows, they all seems to be very stable, no flashing...flickering...problem.
Now I ask to myself, could it be an optical effect due to the pattern of that specific background?
I make the same answer to you all...and did somone notice the same problem?
Please answer me becouse I should have to replace it if I really have this trouble...
THX so much!
Click to expand...
Click to collapse
thats normal. it has something to do with the refreshrate. that occours on every phone and pc monitor and so on. it always depends on what you are viewing at the momeent and often occurs when there are many very thin lines like at the top of the HD.

I have noticed no flickering at all.

@tnyynt
Do you mean I should perform a normal Hard Reset? How can I do it...I still haven't discover how to do it...
@Raziel1
It would be normal if everyone could see it on their HD, but it seems that only some terminals have this problem...Do you mean so that my HD has no problem?
THX to all!

Raziel1 said:
thats normal. it has something to do with the refreshrate. that occours on every phone and pc monitor and so on. it always depends on what you are viewing at the momeent and often occurs when there are many very thin lines like at the top of the HD.
Click to expand...
Click to collapse
A LCD display shouldnt flicker. It's either a hardware or software problem. Old CRT-monitors and TVs flickered because they "painted" the picture from top to bottom, and if they didnt do it fast enough it was perceived as flickering. LCD displays uses a dot matrix and shouldnt flicker regardless refreshrate.

Marinese said:
A LCD display shouldnt flicker. It's either a hardware or software problem. Old CRT-monitors and TVs flickered because they "painted" the picture from top to bottom, and if they didnt do it fast enough it was perceived as flickering. LCD displays uses a dot matrix and shouldnt flicker regardless refreshrate.
Click to expand...
Click to collapse
Do you mean that I'm calling my display problem improperly or that it really can be a problem of this kind of display and so it means it is broken?

I have been noticing this exact same flickering, and couldn't decide if it was normal or not!?

but this flickering only occures when there are certain things on the screen like the thin lines of top of the home screen. its not the screen itself which is flickering. maybe it has something to do with vision and not with a technical aspect. the same thing can be seen on every screen i ever looked at. you can try it out, by taking a picture of a pc monitor at close range with high resolution. when you look at it and scroll around with zoom, it will often flicker like hell because of all the details and maybe downscaling or whatever

asci said:
Do you mean that I'm calling my display problem improperly or that it really can be a problem of this kind of display and so it means it is broken?
Click to expand...
Click to collapse
I havent seen the problem myself so it's hard to tell. You can often see by looking at it if its a software or hardware problem. If it's a software problem its just a certain part, for example a window titlebar, that flickers. This is usually caused by bad programming, the programmer has told the program to repaint with a certain interval even if there is no change. If it's a hardware problem the flickering usually isnt constrained to parts of the window, for example it doesnt follow the titlebar. Instead its usually diffuse parts of the screen that flickers.

@Marinese
Uhm...I'm figuring out how to test it...If I look at a picture, I can't notice the problem, and it seems to be localized on upper bars and on some particular windows I told before. If I could flash it with another ROM...but it's not HardSPL yet and I would keep it in warrenty untill my provider/seller TIM tell me what to do with it. So it could be a ROM problem too?
It would be usefull to have two of them placed side by side
and see the differences...

For me it seems to happen when the brightness is set to high, or I am in a well lit room with auto brightness enabled. With the brightness reduced I see no flickering...
Does that give any clue as to whether it is hardware or software? It seems to be dark colours that flicker.

@evilskanker
Uhm perhaps if you reduce brightness, you reduce the visibility of the problem as well...
I don't know about the dark colours...but I took a black picture and it doesn't flicker...

I have that exact same issue..
Altought I only notice it, on the upper horizontal lines on the RIGHT in TouchFlo3D.
What is the reason for that? And how to solve it?
Thanks.

I'm not sure we're talking about the same thing, but what I have is quick fluctuation in the brightness level without changes in the ambient lighting. You could call it flickering, although I would say it's not as fast as a flicker in my case. It seems to me it has something to do with the light sensor and its sensitivity. I would like to think that a ROM update will sort it, but we will have to wait and see. I'm not doing anything about yet.

@atomikpt
It's the same of mine and also try to go to "system status" window by clicking on battery, or signal icon and take look of what it happens.
@arisg
Nothing to do with your case. Consider that I desabled the light sensor and I'm using brightness to its maximum level.

display light spot

Hi
yesterday I saw a light spot (that it's visible only with white screen) in the top-right side of the screen, under the power bottom.
it's visible only at high ° of inclination, if I look my tablet directly (90°) it isn't visible
I don't know how it's possible that, has someone info about it?

|DM| said:
Hi
yesterday I saw a light spot (that it's visible only with white screen) in the top-right side of the screen, under the power bottom.
it's visible only at high ° of inclination, if I look my tablet directly (90°) it isn't visible
I don't know how it's possible that, has someone info about it?
Click to expand...
Click to collapse
It's possible that the Digitizer might not be fully contacted at that particular point in the tab. I have seen a couple of posts about this. This is a hardware/manufacture defect more than likely, or something that happened over time and usage. Considering the location near an often used spot, this is probably true.
I would suggest if you can live with it, then just ignore it.
If it really bothers you, then you can remove the back cover of the tablet, and check for loose connection fasteners around the display/digitizer areas. But really, if you have to look really hard at certain angles, in the right light and color, then I would ignore it. Not worth the trouble.

How to explicitly start/call Nook ST sleep/screensaver mode?

I'm running a rooter Nook ST and Relaunch. For some reason the e-ink display/text etc fades as I work. The only thing that fully refreshes the e-ink is the sleep/screensaver mode. Is there anyway I can invoke the sleep/screensaver mode? Obviously I don't want to wait for it to kick in after a time-limit.

Pajamaman said:
I'm running a rooter Nook ST and Relaunch. For some reason the e-ink display/text etc fades as I work. The only thing that fully refreshes the e-ink is the sleep/screensaver mode. Is there anyway I can invoke the sleep/screensaver mode? Obviously I don't want to wait for it to kick in after a time-limit.
Click to expand...
Click to collapse
Did you ever try the Nook Clear Screen app? And, does it help to press the "n" button and then touch the greyed-out screen?

Thanks for responding. I have installed the clear screen app, which I was unaware of.
Pressing 'n' and invoking the grey screen did not refresh the screen.
I have been testing the device, but guess what--now it refuses to repeat the problem! It's been producing the error for months, and now it's stopped. I can only think the installation of the app did "something," or possibly I am using it in a slightly colder room.
The e-ink did start to fade once, but I simply pressed the screen menu button (next to the back button on the status bar) it the screen refreshed effectively. Previously nothing except standby mode would refresh the screen. Very odd.
Anyway, hopefully it's fixed, but being unable to replicate the error, I cannot be sure. If anyone does know how to call the standby mode, I would appreciate it.

No, the problem is still there. The Clear screen app doesn't fix it. Before I rooted the Nook (and maybe after?), I used to be able to activate the standby screen by just pressing the 'n' home button, but I can't figure out/remember how to do it.

Found it. Just tap the power button.

Pajamaman said:
Found it. Just tap the power button.
Click to expand...
Click to collapse
This sounds to me like a hardware issue, unfortunately. Once a screen is displayed all the little particles are supposed to remain in place if no additional current is applied (hence the complete shutdown screen never goes away until a boot.).
But I could envision a scenario in which a tiny current leak gradually degrades the image on the screen by allowing the dark particles to migrate. If it's something like that, there's no hope of a software "fix".

nmyshkin said:
This sounds to me like a hardware issue, unfortunately. Once a screen is displayed all the little particles are supposed to remain in place if no additional current is applied (hence the complete shutdown screen never goes away until a boot.).
But I could envision a scenario in which a tiny current leak gradually degrades the image on the screen by allowing the dark particles to migrate. If it's something like that, there's no hope of a software "fix".
Click to expand...
Click to collapse
I agree it's hardware. The text degrades/disintegrates over time, so appears fainter. If I scroll the text, the degradation for each letter is carried with the scroll. So I suspect the fault is not actually with the e-ink screen, but perhaps in the memory-image/RAM that is displayed on the screen. Perhaps that is the screen-controller (I'm not au fait with the tech).
In any case, calling the standby screen a couple of times, and more effectively leaving it in standby for a little while does refresh the screen and repairs the degraded text. This at least makes the device usable for my purposes.

G4 Digitizer problem?

I have a Moto G4 that has had the touch screen become very erratic lately. This issue appeared shortly after a factory reset. The phone is stock, recently OTA updated to NPJ25.93-14.7. It frequently freezes and won't respond to touches of apps or the home/back/recent buttons, and won't side scroll to the next screens properly. Sometimes random apps launch on their own without any touch, and if you try to quit them with the back button they keep relaunching. The problem is intermittent.
I activated "Show Taps" in Developer Options and when the problem is happening there is a tap dot near the lower right side of the screen. It bounces up and down a little bit and vibrates sometimes. When this dot is visible tapping on anything else like app icons or buttons usually has no effect, however the taps are shown on the screen. If I hit the power button to make the screen go black it will sometimes recover when I reopen the display, other times it takes a reboot.
Wondering if it's a hardware issue, a guy at a Verizon store who seemed to know more than most said it was a faulty digitzer--it's seeing touches where there are none. I've replaced displays successfully before, would just like to have a confidence level that the digitzer is really bad before doing that, as opposed to a software or other hardware issue. Any ideas about problems that might cause this problem, like other hardware or a corrupted OTA? Seems very hardware-ish to me, but I'm no expert.
I have Drive links to a couple of short videos on the symptoms, can send links. Much appreciate any insights.

Mine has that issue as well. It will spam the 9 key on the unlock screen or anything in that spot if an app is open or what is on that spot at the home screen. I have to double unlock the phone to fix it. I guess turning the screen on and back off resets it for that session. But it's mostly every time the screen goes dark and comes back up I have to turn the screen off and back on to use the phone.

I had a similar problem and was able to send it in under warranty and get a replacement phone

G4 Digitizer or ghost touch
Apparently this is called Ghost Touch issue, and affects many phones. One solution tried is to disable Battery Optimization for System UI and Google Now Launcher in Settings>Battery>Battery Optimization. That seemed to cure it for a week or so, but the problem returned today. I can sometimes recover form it by hitting the power button to blank the screen and then reopen. Other times it requires a reboot. I see all kinds of alleged solutions out there from dimming the brightness to removing tempered glass protector to using a slow charger, but those don't seem like real fixes but workarounds (if they even work at all). Any other ideas?