Bought a nearly new galaxy tab2 from the internet, but the touchscreen seems not to be working.
Any idea what that can be. Could it be something with a ROM, or does it need to go to Samsung.
OOge said:
Bought a nearly new galaxy tab2 from the internet, but the touchscreen seems not to be working.
Any idea what that can be. Could it be something with a ROM, or does it need to go to Samsung.
Click to expand...
Click to collapse
It could be failed hardware, a bad cable, or perhaps a problem with the touchscreen controller chip.
If you can capture the boot messages using 'dmesg' over ADB, there may be info there that could help determine which.
If it's under warranty, return it to the seller for a refund or replacement, else just keep searching for a solution :\
OOge said:
Bought a nearly new galaxy tab2 from the internet, but the touchscreen seems not to be working.
Any idea what that can be. Could it be something with a ROM, or does it need to go to Samsung.
Click to expand...
Click to collapse
When you say the touchscreen "seems" to not be working, what exactly do you mean?
Does it not work AT ALL, or is it just not very responsive to your touch, i.e. scrolling is slow and choppy and/or pinch to zoom is flaky?
Because I have noticed certain apps do not work well on my 10.1 when it comes to the touchscreen, when the tablet is under heavy load. Are you experiencing this more with certain apps, like Chrome and/or Samsung Keyboard? If that's what is happening, I can help.
I use a custom firmware, so not possible to return to samsung.
As it is stuck on the install screen, I can't enable debug for ADB.
Or is it auto enabled on a custom rom.
What has the highest chance of failing. Logic board or digitizer (as the cable is not sold seperatly)
I have a Tab 2 P5110, I bought it as faulty as the touchscreen is not working. Otherwise it's alive and responding to the buttons.
After reading several topics it looks like it is a bug that can only be fixed by physically replacing the digitizer panel.
Of course I'd prefer a software solution but so far what I've found wouldn't work on this model due to HW difference.
Can someone confirm that?
Thanks.
Related
My nexus s at times tends to be unresponsive at the center part of the screen. This problem has actually plague me from since I was in stock 2.3.1 and followed on up to now. From my searches, I know I'm not the only one that has this problem and some speculate that having a screen protector contributes to this problem.
My best bet is that this would be more of a software problem than a hardware side as a quick lock/unlock always fixes this issue. Below is a request by someone in cyanogenmod and I find that his response seems to have some good basis. I was hoping with a better background in developing this stuff could help. Also what to know who else out there is experiencing the same problem.
Recently I've got a Nexus S, and I fount its touchscreen sometimes unresponsive, especially right after unlock. The center of the screen cannot sense tapping, but the edge and corner area works well. The four soft keys always works great, but I think they are controlled by a different cypress chip. I've tried to connect adb and "cat /dev/input/event0" and the result confirms my observation. Searching a Chinese android-lover forum, I found several guys are experiencing similar problem. (Some are running stock, others, including me runs CM-7rc). The problem can be strangely solved by locking and unlocking the phone quickly, and when the touchscreen is working correctly, it's actually very sensitive and responsive.
Suspecting a driver issue, I looked into the source of touchscreen controller (AMTEL MXT224) driver (/driver/input/mxt224.c) by Samsung and compared it to drivers of the same chip by Motorola and HTC. I notice that HTC and Moto's drivers send calibrate signals to the touchscreen controller in there resume method, but samsung's does not. I doubt whether it's the cause of issue. Modifying driver and compiling android kernel are beyond my knowledge, so I'm calling for help.
I know not all nexus s are suffering this, so I'm read to test and provide feedback. Any help would be greatly appreciated!
HTC driver (http://pastebin.com/7BZvp50x, http://pastebin.com/wxMV9ifY)
Moto driver (http://pastebin.com/5jnT8jvv, http://pastebin.com/yNH3nUa5)
Click to expand...
Click to collapse
I'm on stock 4.0.4 and I have an i9020a. Ever so often, when I'm typing on the keyboard (sending a text message or whatever) one key will stop responding to light touches... you need to press it hard. Sometimes it will be the a key, the s, key or the f key etc. It happens once or twice every two days i would say. I'm just a bit scared that it could develop into something worse? Should I be worried? Is it a software or hardware problem?
Thanks a lot!
Try to download other keyboard app, like go keyboard...
If downloading a keyboard app doesnt work.
You would have to probably to a reset.
Wipe dalvik cache and cache. Make sure you back up EVERYTHING onto. eg gmail.
Apps can be redownloaded from your saved list in google play store.
Back up using titanium back up or any other back up program that works for you.
When I unlock my screen and the keyboard is still there because I left it when I locked my phone... I got the same problem too.. I need to re-lock and unlock it..
Yeah.. clearing cache and dalvik cache doesn't work. I've also done many factory resets and I still have this problem.
Have you tried clearing data for Android keyboard under settings | apps | all?
Sent from my Nexus S using XDA
Developer options has a touchscreen "test" feature. Can you verify that the phone registers touches in that region with and without the keyboard?
Harbb said:
Developer options has a touchscreen "test" feature. Can you verify that the phone registers touches in that region with and without the keyboard?
Click to expand...
Click to collapse
Good idea! I'll try that and get back to you. It's been happening slightly less recently... but the problem is still there.
Harbb said:
Developer options has a touchscreen "test" feature. Can you verify that the phone registers touches in that region with and without the keyboard?
Click to expand...
Click to collapse
The phone doesn't register touches in that region (I tried with the touchscreen test feature) It happens really rarely, but should I be concerned? It seems like I had more problems with ICS then Gingerbread. I still have my year warranty, but don't wanna use it up yet.. I don't know what to do?
You don't "use it up", you'll still have 12 months warranty from the day you bought the phone, you will however be without your Nexus for a 2-3 weeks.
If there is no screen protector or similar in the way and you have the same problem with different ROMs (particularly stock ROMs), i would straight up classify it as hardware and get samsung to sort it out for you. It's not so much that it could get worse or something like that, but that is a problem which you don't need to be going through.
Just be sure to fully test some stock ROMs, after full wipes, to make sure it is hardware related - if the problem persists, definitely make it samsungs problem.
Harbb said:
You don't "use it up", you'll still have 12 months warranty from the day you bought the phone, you will however be without your Nexus for a 2-3 weeks.
If there is no screen protector or similar in the way and you have the same problem with different ROMs (particularly stock ROMs), i would straight up classify it as hardware and get samsung to sort it out for you. It's not so much that it could get worse or something like that, but that is a problem which you don't need to be going through.
Just be sure to fully test some stock ROMs, after full wipes, to make sure it is hardware related - if the problem persists, definitely make it samsungs problem.
Click to expand...
Click to collapse
I don't want to risk losing my Nexus S for 2-3 weeks, for now at least. It's been happening very rarely recently. Maybe once in the past month. For now, I'll continue using my Nexus S but I probably will send it in for repair in September or so
I have a similar problem - only my Nexus S almost NEVER respond to light touches
I ALWAYS have to type slowly and firmly to make it each touch register.
Another broken behaviour about Nexus S' touchscreen (or the driver) is that swipes aren't registered until 3-4 millimeters into the swipe
This means short swipes are often interpreted as taps stopping the motion
Get this: I even had mine sent to repairs but they said Samsung tested it and claimed there were no faults whatsoever!
I'm gessing it's a badly badly designed driver - Google's way of avoiding "accidential taps".
Not sure I'd ever buy another Samsung or google branded phone. Only after THOROUGH testing of that touchscreen.
Hi All, I have P900 which I bought about 5 months now, and all the sudden the WiFi is not working as it keep switching on and off automatically (problem which similar to S4 WiFi) and off all the time. I have been doing factory reset, and flashing roms. None of them works. Now I would like to try flashing the modem module just like S4 fix, but I have no idea on where to find those files. I would really appreciate if someone could give me some lead on this, or any other ways for those who have similar problems. Please help.
Same problem (SM-P905V)
I see that this thread is really old but I am having the same problem and I can not find anything on the internet to fix this problem. I bought a refurbished note pro from amazon last September (so it is out of warranty). This is my last ditch effort to try and fix this on my own. If I can't get any help then I will just have to send it to Samsung to try and repair it.
My wifi worked just fine for all this time then about a month ago I was having problems with the bluetooth not connecting. I ignored it at the time as I was going to work on it at a later date. Then about a day or two later it started working again.
Now about a week and a half ago my wifi and bluetooth stopped working. I have factory reset but still nothing. I can get the wifi to even turn on any more. Occasionally I can get the bluetooth to work for a minute or so but 99% of the time neither one works.
I hope that someone can help me with this and I can get it resolved without having to spend a fortune.
PS If no fix then what do you suggest as a replacement? I love all the features of the note pro. I like the stylist, the screen resolution, and the multi-window features. I need a big screen for my business. I use it for a slide show at events.
moparcrazy72 said:
I hope that someone can help me with this and I can get it resolved without having to spend a fortune.
PS If no fix then what do you suggest as a replacement? I love all the features of the note pro. I like the stylist, the screen resolution, and the multi-window features. I need a big screen for my business. I use it for a slide show at events.
Click to expand...
Click to collapse
Bluetooth and Wifi have many components on mainboard, repair them is beyond anyone including professionals.
My suggestion is looking for a Note Pro with broken display or woking mainboard only on Ebay; it may cost around $120, more or less depending on luck.
Take out the mainboard is quite easy, only 3 screws at two speakers, I can swap the mainboard within 10 minutes.
http://www.ebay.com/itm/401145234611?_trksid=p2060353.m1438.l2649&ssPageName=STRK:MEBIDX:IT
Any SM-P900 ( wifi ) or LTE ( 905, 907 ) mainboard will fit to your existing tablet except rear camera ( LTE rear camera won't work with Wifi model mainboard ).
Since the thread is four years old, this is not really a follow up, but just a note in case anyone is having similar issues. Actually bluetooth + wifi repair on samsung tablets are possible for end user - if you are semi-lucky and broken components are not hard to replace items such as ICs. But first, be sure to rule out any OS level issue by flashing stock rom on the tablet. Then if the issue persist, then if you can locate service manual for the tablet in question, it comes with level 3 step by step instruction (and board view of components) on how to troubleshoot bluetooth + wifi hardware issues. Often the broken component is not the major IC itself, but discrete components such as capacitor, filter or resistor. In some cases issue may be fixed just by reflowing the IC itself with hot air rework station. So there is indeed good chance you can fix hardware issue with a bit of work and some cheap hot air rework station (such as 858D sold on ebay for $30 including shipping).
Ok the worst scenario is that wifi ic is bad and need to be replaced. Good news is that Samsung uses popular wifi ic, such as broadcom chip. And although it's a bga chip, it's quite small, making replacement using hot air gun possible. So will a lilttle bit of skill and luck, it's definitely possible to repair samsung phones/tablets with broken wifi hardware.
Hello,
I have just bought my first android phone, Samsung core 2.
The problem is, it works very smooth, but there is very noticeable input lag on touchscreen. During surfing internet or playing a game, when I touch screen there is 0.3-0.5 seconds until it is registered. That delay is very annoying when texting and gaming. I have tried out my friend's Core 2 and he does not have this problem. Many other phones that are lot worse than it have almost instant touchscreen response, yet my phone sucks when it comes to that.
I bought it only like 3 days ago and they won't return my money or replace the phone. Only thing they offered is "we can "do" software on your phone" (I do not know what they meant by that). So I'm stuck with this phone which otherwise works nice but has this horrible touchscreen input lag.
Are there any things which can help me to make touchscreen response faster? Like flashing custom ROM on it or something? Did anyone else have similar problem with it?
hrop said:
Hello,
I have just bought my first android phone, Samsung core 2.
The problem is, it works very smooth, but there is very noticeable input lag on touchscreen. During surfing internet or playing a game, when I touch screen there is 0.3-0.5 seconds until it is registered. That delay is very annoying when texting and gaming. I have tried out my friend's Core 2 and he does not have this problem. Many other phones that are lot worse than it have almost instant touchscreen response, yet my phone sucks when it comes to that.
I bought it only like 3 days ago and they won't return my money or replace the phone. Only thing they offered is "we can "do" software on your phone" (I do not know what they meant by that). So I'm stuck with this phone which otherwise works nice but has this horrible touchscreen input lag.
Are there any things which can help me to make touchscreen response faster? Like flashing custom ROM on it or something? Did anyone else have similar problem with it?
Click to expand...
Click to collapse
see Samsung Galaxy Core 2 (SM-G355H) Root by cyyong95
This thread will be moved to Galaxy Core Q&A, Help & Troubleshooting
Hi,
In your settings menu find Magnification gestures which is triple tap to zoom. Turn it off and then your input, touchscreen and numberpad dialing will be very smooth.
Thanks,
Pr0Ankit
hrop said:
Hello,
I have just bought my first android phone, Samsung core 2.
The problem is, it works very smooth, but there is very noticeable input lag on touchscreen. During surfing internet or playing a game, when I touch screen there is 0.3-0.5 seconds until it is registered. That delay is very annoying when texting and gaming. I have tried out my friend's Core 2 and he does not have this problem. Many other phones that are lot worse than it have almost instant touchscreen response, yet my phone sucks when it comes to that.
I bought it only like 3 days ago and they won't return my money or replace the phone. Only thing they offered is "we can "do" software on your phone" (I do not know what they meant by that). So I'm stuck with this phone which otherwise works nice but has this horrible touchscreen input lag.
Are there any things which can help me to make touchscreen response faster? Like flashing custom ROM on it or something? Did anyone else have similar problem with it?
Click to expand...
Click to collapse
If u state what version of OS are U using and model and if it's stock launcher with purely ported touchwiz for our phones, try flash/upgrade or use the custom roms if available.
Regards
Suddenly OTG and Gear VR are not working on my S8 plus. no water, drop or anything. I have the device for only 2 weeks. No OTG device works (tried with genuine type c to usb adapter). It used to work like two days ago. I did factory reset and reinstalled firmware using smart switch. In addition, Gear VR is not being recognised anymore. PC connection and data transfer using the cable work ok. I believe OTG uses different pins. May it be a hardware issue? I remember getting some high-powered device connected before it stops working at all (using just a simple mouse). I tried everything.
I saw that a number of people have the issue on samsung support website. I hope it is not a known issue and samsung just does not state it officially (like the S7 edge pink line).
Please help or let me know if you have the issue too.
Arismfg said:
Please help or let me know if you have the issue too.
Click to expand...
Click to collapse
Lengthy discussion here > https://forum.xda-developers.com/galaxy-s8/help/usb-otg-longer-galaxy-s8-t3640216
cam30era said:
Lengthy discussion here > https://forum.xda-developers.com/galaxy-s8/help/usb-otg-longer-galaxy-s8-t3640216
Click to expand...
Click to collapse
thank you for your reply. I have already checked the thread above. However, no working solution. Is there anyone who managed to figure out if it is a software or hardware issue? I wonder why it is stated as solved. I dont think the guy with the issue fixed it
I contacted oculus support about this issue. Seems to be a widespread software issue that happens with certain models+updates but they aren't doing anything to fix it for unlocked phones as only phones locked to a carrier are supported by gear vr.
povotron said:
I contacted oculus support about this issue. Seems to be a widespread software issue that happens with certain models+updates but they aren't doing anything to fix it for unlocked phones as only phones locked to a carrier are supported by gear vr.
Click to expand...
Click to collapse
Thanks for the reply. Does this also have to do with OTG devices not recognised? Do you have this issue too? What is strange is that Gear VR used to work. At least for a while on my unlocked S8 plus. I cannot understand how this may block the OTG devices. Is there something left in the settings that may block OTG?
By the way, I hope you are not referring to the network issue. My Gear VR is not recognised at all.
I'm having the same problem as you. I hadn't tried otg before the VR wasn't recognised but I can't use it now. Could be my adaptor though. People seem to have the issue appear following phone updates
povotron said:
I'm having the same problem as you. I hadn't tried otg before the VR wasn't recognised but I can't use it now. Could be my adaptor though. People seem to have the issue appear following phone updates
Click to expand...
Click to collapse
Well I gave my phone to the official samsung service and waiting for their reply. I don't think I installed any updates before and after the issue appeared (at least not firmware updates but not sure about oculus or other apps) . By the way it is not the adaptor that has the issue. I tried many others on my phone. And the adaptor works with a friend's S8 (not plus). Only one works (well not really). It iss an OTG type-c to micro usb (bought from ebay) which comes up with a notification that high powered device was connected but then nothing happens whatever option I choose. And it is not a high powered device because it used to work. I tried even a mouse with its own battery. But if it was a phone update, I think a factory reset should fix it? It did not for me.
Do you think of taking your phone to the official service too?
A full factory reset also didn't work for me. From other forums it seems that other people who have taken them in for service receive a replacement phone. Some people however then mentioned that they encountered the same issue a few months later with the replacement. I would take mine to Samsung but it's a grey import and Samsung refuse to touch them even though it's the same model sold locally. If it's definitely a hardware fault I'll consider sending it away but it would be an international service which would leave me without a phone for quite some time.
Yes, you are right. Some people saw the issue after a few months of getting the replacement phone or even after restoring their google account and settings (without being able to get it fixed by factory reset). This is what actually scares me the most because it looks like hardware issue of the phone in general. It looks like a well known issue which samsung does not officially accept. SiImilar to the pink line on S7 edge I had before. Anyway, as charging and connection to pc still work, I can give my phone and get a new model later cheaper. The last two samsung flagships came with issues that (the most important) samsung does not accept officially. Maybe it is time to change brand (always android though).
I got my phone back from samsung service. They did not replace my phone but they replaced both the logic board and the type-c board. As expected, it works again with OTG devices and Gear VR as it is like a new phone after replacing all that. Installed all apps again one by one (not restored from backup) and everything still works. Hope it stays like that. So hardware issue? Looks like it.
I know this is an old thread, but I replaced just the USB board and it didn't fix anything. So maybe it's a motherboard issue?