Hi
I've been having trouble with the touchscreen on my MDA Vario III, I'd be grateful from some advice from some of you hardware gurus.
It seems to be detecting phantom touchscreen input, which can prevent it from properly detecting real input. This was evident in the Notes application, if I were to tap around the screen in draw mode it would sometimes draw dots, but often draw a straight or curved line between the last point and the most recent one. I thought something might be pressing on the borders of the screen so I did the thin card round underneath the bezel thing, which if anything made it worse, though that may just be me imagining it.
I sent it off to a local repair firm for a touchscreen replacement, got it back this morning and it seemed to be ok, but not perfect. During the morning, having rerun kaisertweak and installed a couple of cabs, it deteriorated again.
Right now it's cycling round the Alignment Screen, the cross is moving around on its own periodically. If I try tapping the cross it mostly doesn't detect the tap.
So right now, I've got a month old Kaiser, warranty void and insurance not applicable, that I simply can't use!
My question really is, what could the problem be if it isn't the touchscreen/digitizer (they are one unit on the Kaiser aren't they?) and it doesn't appear to be a physical problem with the housing of the screen? Does it imply a mainboard failure?
Does any user configuration at all survive a hard reset? Such as increasing the touchflo sensitivity with Kaiser Tweak?
Thanks
hipster
I did/do have the exact same issue, however on my unit it only happens when using some third party stylii (spelling?)....one old Ipaq 3970 metal stylus, and 2 multifunction pens. Using the onboard stylus (or any other light stylus, like the one from the P3600) I encounter no problems (knock on wood), no matter how hard I poke on the screen....
Unit is over 3 months old - have gotten used to it, just don´t use any heavy/metal stylus.
Your problem, however, seems to be a bit more pronounced.....
Thanks for the reply, michi, though your problem does sound a bit different, if just a change of stylus improves it.
I've tried the stylus from my old Wizard and the arse end of a pen, without success, sadly.
Oddly, I'm starting to think it might be slightly heat related, if I leave the phone off for a while it seems ok, and stops responding to taps more after it's been on for a while. Very strange.
hipster
I knocked up an impression of what I get when tapping in a pattern in the Notes application, image attached.
Reading other posts about perceived performance problems with the Kaiser, I wonder if there are other cases where it seems like it's locked up, but in fact it's just taking an age to figure out what you've just asked it to do, essentially just a problem with the touchscreen, not the whole device. That's definitely one of the symptoms I get....
It's back with the menders now, hopefully, they'll manage to sort it out this time...
Cheers
hipster
Not sure if it could be similar, but I had a Tablet PC which was prone to interference from the power supply. Perhaps this is the case. May the sheilding is not up to snuff? I am by no means an expert, but this might give you another path to explore for problem resolution. Hope it helps.
Related
I have had about 7 different AT&T Tilts in my life and if my memory serves me right, I only remember 2 of them not having the issue I am about to entail.
When I slide my keyboard out, it seems that the ribbon cable or something under the metal hinge pushes against the back of the screen and you can actually see the screen colors fray and fade as if it would do it you were to push down too hard on it with your finger.
I am just wondering if anyone else has notice this. Wonder if it is a common occurrence. I would like to know what causes this.
No such thing on the 2 I've had. Never read of it on here either.
7 Tilt's? That was a typo, right?
No issues for me at all. No resistance or screen changes when activating the keyboard.
hmmm, odd. yeah 7 man haha
i have the worst of luck with phones. the one i thought was "THE ONE" i would keep till it was time to get a new phone was hit out of my hand and the hinge came loose so I had to replace that. That one did not have the problem i stated earlier. my replacement had that screen/hinge issue so i told em to send me another one by bullshitting that it will crack my screen...the one they sent me to replace that had the 7201 chip in it and 0 hours of talk time so it was brand freaking new...but it also had the screen issue...weird, huh? i wonder if it is anything to worry about?
The momentary color shifting occurs when you are applying too much pressure to the wrong area when sliding the phone open. I don't see this is normal use since I baby my Tilt, but I am able to reproduce it when I purposely try to.
NotATreoFan said:
The momentary color shifting occurs when you are applying too much pressure to the wrong area when sliding the phone open. I don't see this is normal use since I baby my Tilt, but I am able to reproduce it when I purposely try to.
Click to expand...
Click to collapse
yeah, i am aware. it happens regardless what i do. trying to figure out what is causing it so i can find a fix
Speaking from my job experience of ripping apart laptop LCD's, it's probably the ribbon cable; as mentioned previously...
Hello folks,
I've had a kaiser now for a couple of years, but recently its developed an interesting problem/quirk.
When I first boot it up, I'll get one touch on the touchscreen, and then no more. Doesn't matter if i turn the screen off and leave it for a day, or anything, I'll get no more until I reboot.
One time recently, however, it worked for multiple touches over 30 seconds or so. When I picked it back up again later, it went back to its usual self.
I've ruled out any software issues by flashing to a much newer rom with a new radio. The behaviour is still the same.
My first thought is that there might be something pressing on one of the edges of the screen, so that I can "click", but not release. I tried cleaning out under the bevel with a pin, and although i pulled out half the contents of my pockets, the issue remains unresolved. I'm ordering some small torx screwdrivers to get the bevel off, to give it a more thorough cleaning.
Does anyone have any other ideas I could look into? I'm hoping its not a dead screen, although its very unusual behaviour if it is.
Lastly, I came across an app a long time ago that was being used to show the ability of multitouch on touchscreens. It would show the pressure/point of contact on screen. If I could get something like this, or indeed any information on the screen pressure, I would know for certain whether my theory about being able to press but not release is accurate. I've searched, but I havent managed to turn up anything. Does anyone have this cab/something like it?
Thanks for any help guys.
I've been running hyper dragon III on my tilt for the past few years. A couple of days ago my tilt started acting flakey, pulling up sms, email, contact lists, and dialing random numbers ,44924444466634444.......repeating like a stuck key. I reset but to not avail. I took out the battery and reset again, no luck. I figured it was time to replace my venerable hyper dragon with a shiny new Rom. I chose a clean wm6.5 Rom, ahmedfikry wm6.5 23569 Tilt 3D UC light Rom V2 . It seemed to work... at first. I was excited with the speed, the response, of this new interface and smugly back patting myself ... when the buggy behavior returned; hmm, I thought, a bad flash?, so I went back to the wiki, reformatted SD card, reset, rebooted... no joy! It can't be viral...can it, or worse some malignant kaiser killer cancer; can it? Insights, ideas, recommendations? Please be kind, I'm very vulnerable right now....
UPS just delivered my brand new seidio extended tilt battery! It came a day early, oh joy! Murphy strikes again... : )
if it is starting programs that are linked DIRECTLY to hardware buttons, i would suspect your kaiser's buttons or the cables from the buttons have gone faulty (hardware problem).
everything you say seems to point to things that are linked with buttons...there is a button for sms/email, all the numbers have buttons (on the keyboard) and even the contact list is sometimes mapped to one of the soft keys on some screens (e.g. the "All Contacts" button on the contacts page of manila).
so perhaps your buttons are the problem...they might be "sticking" or a cable or set of cables might have come loose or they might have cracked.
the only other possibility i can think of is that your screen protector might need changing. even worse, your touch screen may have gone faulty (hardware problem). you can try realigning the screen but i doubt that will help if the issue is sporadic.
finally, you might want to see if something physical triggers the issue. maybe holding it your left hand upside down? maybe slide open the top? or maybe more frequent when the keyboard is hidden? or try to apply pressure near the buttons or near the frame of the screen to see if that makes the issues more frequent?
good luck!
ASCIIker thanks for your insightful reply.
I fear you to be correct. I did not think to correlate the type of programs and their use of hardware buttons. I did however disassemble my sick little baby last night after posting. I went looking for pocket gunk or loose connections. I had replaced the LCD about a year ago and while it work fine after that, a loose screw wasn't impossible. Too my never ending surprise it booted up upon reassembly, but to my disappointment it began to exhibit the same freaky symptoms. I decided to do a Rom flash, but now was unable to get to my tricolor screen! After about 20 attempts, I gave up turned it off and put in my new battery. A long charge later, I turned it on to drain and train the battery expecting it to resume its schizoid activity...but no! I find a lovely 6.5 win-mo screen an a well behaved phone. I'm determined to solve this conundrum. I would like to say it was the principle of the thing, but really I'm driven by my ocd nature reinforced by cheapo habits. ASCIIker, do you think if I disconnect the 'd pad' connector I might be able to confirm your hypo? I sure I can get it to repeat its bad behavior if just spend some time reloading and setting preferences. Once I get it perfect its sure to fritz out! Either way thanks again.
This may be a problem beyond the scope of android, but seeing as I'm running it, I thought I'd try here first.
I've noticed that the lower left hand side of my screen has a "dead spot" where touch is simply not registered. To illustrate, I went to screen calibration's test screen and drew a straight line along the edge of the screen. (See Attachment)
I've tried recalibrating the screen (manually and resetting to default calibration) as well as wiping data and reinstalling the system. Reinstalling the system worked once, but then the problem came back and subsequent reinstalls did not fix the issue.
I'm running Incubus26jc super froyo [RLS 12] on the 15-07-10 340X480 Froyo Kernel.
Anyone else seen anything like this? As far as I can tell, the problem is not getting any worse. Currently, it's only a hindrance when trying to use keys in that region, but I can work around it by switching to and from landscape. It's a bit of a hassle, so I'm hoping someone may be able to shed some light on the situation.
I was sure it was hardware until the system reinstall fixed it, but am now baffled as I can no longer replicate the fix.
I have not tried reinstalling the kernel but will at some point in the next day or so. I'd like to avoid switching back to WM to check if the problem persists, but may have to... we'll see. Doing everything I can to make this phone last until the Incredible month of February when I'm up for an upgrade.
dont know the issue resolution... but i have the same with my touch vogue.. and in the same 'area' apparently as well.
hard for me to hit the 'a' key on my keyboard. hehe
I'm glad to see I'm not the only one... anyone else?
Bottom right corner for me... I was able to calibrate around it but it took a few tries.
Sent from my Full Android on Vogue using XDA App
The sensitivity across my screen was inconsistent some time ago. I found that years of my abuse had taken a tole on the exterior of my phone. It eventually got worse and I bought a new housing (with a new digitizer) on ebay for a reasonable price. If it is hardware then it really isn't that hard to fix if you like taking things apart.
If you're sure that win mo accepts input from that part of the screen then nevermind my post. I would play with a painting app though and investigate the hardware further.
I may be talking a little out my a$$ with this part but.. is it possible that in calibrating your screen the os may change it's settings on how hard you have to press and such also. that may be how you got it working.
In any case, my investment in a hew housing was well worth it considering how modern my old phone has become thanks to the developers here.
gooph said:
I may be talking a little out my a$$ with this part but.. is it possible that in calibrating your screen the os may change it's settings on how hard you have to press and such also. that may be how you got it working.
Click to expand...
Click to collapse
In my case, no - when drawing a straight line down or across the screen, the line starts 'moving' away from the stylus (like the picture in the OP).
Gah... now it's shutting itself off randomly and the dead spot has grown. Not good at all.
Yeah, mine was better for a while then 'slid' again. I ended up swapping the digitizer with my other Vogue and things are back to normal.
Sent from my Full Android on Vogue using XDA App
I have another vogue, but am weary of doing anything like that. How hard was it to get done?
All you need to do is switch the front half of the housing rather than the digitizer itself- it's not hard. There's a teardown guide somewhere in the forum, Google Vogue teardown and it should be at the top.
Sent from my Full Android on Vogue using XDA App
The only thing that worries me is that my spare vogue exists because it was dropped in a muddy puddle. I'm hoping the water damage isn't too bad. Guess we'll just have to see.
it is really annoying
I have the exact same problem and I too thought it was a hardware issue till I saw this Thread. I was ignoring it till two days ago when it started really bugging me. Now, I don't even need to press any button and it automatically gets pressed around the curve and I have a google search box there, so it keeps on searching for eee or sss randomly and started draining my battery. Is there a proper fix for this?
I thought I'd chime in too... I could never seem to calibrate the touchscreen properly in either Android or Debian. Changing the screen resolution (i.e. msmfb scaling) seems to have no effect, whether it's 240x320 or 640x480. Any area within 5mm or so of the edges of the LCD will register as the edge, making "A" and several other keys on the virtual keyboard impossible to hit. Passing calibration values to the kernel didn't seem to fix anything, but it's possible I was using them the wrong way...
i have the same kind of problem on my Kaiser... i think its realted to hardware... either the housing or the digitizer...
I am experiencing the same problem on X10 mini pro. the same screen spot exactly, i have to try very hard to get z or x or shift to work. Sometimes when I try locking the screen and unlocking it back, it works.
update
so after a very long time with this problem i decided to change the digitizer and problem is gonne. visualy the broken digitizer had nothing wrong with it. The fix was fairly easy though, there is no glued parts involved into getting a new digitizer on the u20i.
Touch Screen
I just bought a brand new Cubot One and it looks more than perfect! It has just a little problem with the touch screen ( I think its the software, need ROM change). There is a dead line on the right side of the screen that touch doesn't work at all. Any solutions? Anyone faced that before? Can I fix it myself or do I have to send it back for replacement? Is there any video or guide that shows its done?
I uploaded a video on YouTube to show the problem but i cant post it yet.. (new member)
You can write "Cubot One touch screen problem" and it's the 1st one.
Thank You!
Many users including me have faced this issue,the tablet screen automatically starts showing surface touches without any human intervention!!!!
so if you are looking for a fix to this issue you are on the right thread :victory:
Here are few things that worked for me and probably will work for you too
1.lock your tablet and open it again (ie make the display go to sleep for a while)
2.Reboot your device
these were the basic steps that might help but still if you get phantom touches refer further ;
This is the most important step that helped me and many users
*Go to settings>developer options>force GPU rendering (force use GPU for 2d drawings) click on it and enable it.
reebot your device
I cannot guarantee that doing the above procedure will fix all your touchscreen issues but as far as phantom touches are concerned it might help
to force GPU rendering is IMHO useless because all system apps and most play store apps use 2D GPU rendering already. This option is only there for developers who want to test their apps with 2D GPU rendering.
KRAKEN® said:
Many users including me have faced this issue,the tablet screen automatically starts showing surface touches without any human intervention!!!!
so if you are looking for a fix to this issue you are on the right thread :victory:
Here are few things that worked for me and probably will work for you too
1.lock your tablet and open it again (ie make the display go to sleep for a while)
2.Reboot your device
these were the basic steps that might help but still if you get phantom touches refer further ;
This is the most important step that helped me and many users
*Go to settings>developer options>force GPU rendering (force use GPU for 2d drawings) click on it and enable it.
reebot your device
I cannot guarantee that doing the above procedure will fix all your touchscreen issues but as far as phantom touches are concerned it might help
Click to expand...
Click to collapse
yep thats what i did if i got it
but the GPU rendering i did not try
USBhost said:
yep thats what i did if i got it
but the GPU rendering i did not try
Click to expand...
Click to collapse
I can't give the reasons how 2d rendering works but it worked for me and I have searching for other possible reasons for phantom touches here is another possible reason
1.open your back panel, look at the right side,there is a black piece of foam tape on the cable attached to the touchscreen. when touching this tape or slightly pushing
down on this part of the device touch input starts to go crazy. I have noticed this also happens when the cover is closed and
you push down on the spot where the tape is.
So this probably means the ribbon cable gets flexed too much or maybe shorts when pressure is put on the back of the
tablet.
Put a little piece of plastic right under where ribbon cable comes up from the screen
and you are done
WARNING: Be careful or you might screw up,I will not be responsible if you spoil your Nexus
KRAKEN® said:
I can't give the reasons how 2d rendering works but it worked for me and I have searching for other possible reasons for phantom touches here is another possible reason
1.open your back panel, look at the right side,there is a black piece of foam tape on the cable attached to the touchscreen. when touching this tape or slightly pushing
down on this part of the device touch input starts to go crazy. I have noticed this also happens when the cover is closed and
you push down on the spot where the tape is.
So this probably means the ribbon cable gets flexed too much or maybe shorts when pressure is put on the back of the
tablet.
Put a little piece of plastic right under where ribbon cable comes up from the screen
and you are done
WARNING: Be careful or you might screw up,I will not be responsible if you spoil your Nexus
Click to expand...
Click to collapse
Don't worry I soldered to the bord of my tablet 3+ times
But I don't seem to get phantom touches anymore
Well once evey 2 months or so. I'm fine
Theoretically it dosent help because its a hardware problem.I have ever met that probelm and fortunately my tablet was in warranty that time then i sunk help to ASUS.I witnessed how they solve the probelm:They cable-flashed a screen aligning rom into it and callibrated.Then they flashed the stock rom and everything is Okay now.youd better call the supporting center.
AqCwW said:
Theoretically it dosent help because its a hardware problem.I have ever met that probelm and fortunately my tablet was in warranty that time then i sunk help to ASUS.I witnessed how they solve the probelm:They cable-flashed a screen aligning rom into it and callibrated.Then they flashed the stock rom and everything is Okay now.youd better call the supporting center.
Click to expand...
Click to collapse
There are many possible reasons to have phantom touches on screen let me explain
Capacitance has little to do with conductivity and virtually no electrons actually cross the
capacitance gap (think insulator). It is a measure of a change in the electromagnetic field around
the anode and cathode...causing a change in the difference of pressure between negative and
positive electrons on those competing surfaces separated by an insulator (or ambient charge).
By bringing something capable of either holding a static charge, conducting electricity or otherwise
affecting the measured capacitance (electromagnetic field) near it, the capacitance changes and this
is how it determines where the screen is being touched. It doesn't have to actually contact (or
conduct) which is why you can place a thin cloth or piece of paper over the screen and still activate
it.
Don't believe me? Try it. Put a piece of printer paper over the screen and then try to select an app.
Don't be too shocked when it loads. Another test , even more revealing to prove it... Put your phone
in a zip-lock bag (the plastic bag doesn't conduct electricity), and zip it closed. Then watch in
amazement as the phone's touch screen works perfectly inside the bag. If this weren't true, then
screen protectors wouldn't work unless they conducted electricity.
Moisture, grease, dirt...even dust changes the capacitance and can create an unstable reading such
that it can detect "ghost" touches, or real touches can be distorted fooling the digitizer into thinking
it has more than one press going on (this is a multi-touch screen digitizer), or that the actual press
is somewhere else on the screen.
Voltage fluctuations and "dirty power" such as produced by lower quality wall adapters can also
cause similar results. There are plenty of threads on the subject.
In your case, it was obviously hardware, but just because you identified and resolved your issues
regarding hardware, doesn't mean anyone else who offers an alternative potential cause is a "weirdo". By making blanket statements like that one, you effectively rule out all but your own
hypothesis, and then you make yourself look like the "know-it-all weirdo".
My device and solution
Like stated problems may come in different forms and solutions may vary depending on the issue. However after reading a lot of different forums I decided to fix the issue myself.
The problems were a lot of "phantom touches" and not responsive to touches at all. Only a lock up and open or reboot helped until I found out what caused it for me.
I have Nexus 7 2012 model and my problems were temporarily solved. I traced the problem to the touch screen connector (the one with 2 separate heads). So every time when you press on the case from the left side with your left hand roughly in the middle, the problems started. I opened the case and wiggled the cable to verify. Then I applied an extra screw to the one possible hole next to the cable to firm up the casing and so it doesn't bend inward towards the cable and cause the connection issue. Helped for some time. I have to find a more permanent solution. The linked video will show you the location on the cable and how to open your nexus 7 2012. Only do it if your WARRANTY IS NOT APPLICABLE AND WITH YOUR OWN RISK!!! Otherwise use the generic warranty routes and follow those. I shall not take any responsibility for your bricking your device. [Well I'm new and can't post the link to the tube video, but you can search it with the title "How to Fix Nexus 7 Touch Screen Problems" by Tampatec]