Hi everyone, I need some help with this tablet I got a couple of days ago and that I'm trying to fix. I just need some opinions from someone that maybe already had an experience with such a problem or someone more expert than me. On the back it says it's a Mediacom tablet, but I don't think it really is... It says "SmartPad 7.0 S2 3G", however the model number written below says M-MP7S4A3G, which is the model number of the SmartPad 7.0 S4 3G. And this thing doesn't look like a SmartPad S2, it's black and doesn't match the pictures of the product from the manufacturer. It also has a clean Android ROM in it, without any Mediacom customization or app (maybe someone replaced the ROM... I don't know... but that model number discrepancy doesn't convince me).
By the way it runs quite well, and I would like to keep and use it, however it has an annoying screen flickering problem that shows up and increases its "blink-rate" the more I use the tablet. If I put it in standby mode and let it cool down, the problem disappears, until it gets hot again of course (please note that I'm just guessing when I say that the screen flicker is related to the temperature, it could easily be another kind of problem). The flicker also appears in recovery mode so I think it's hardware-related.
When it occurs, the colors quickly change and then come back to the correct ones, with a variable frequency that seems related to the temperature (again: just an assumption, better to say the frequency is related to "how much time you have been using it", from what I can understand). I can also see horizontal lines when the blinking occurs. If I keep using the device, after a couple of minutes, the wrong-colors state takes over. If I'm viewing a black and white page the problem isn't noticeable.
I opened the tablet and tried to move the display connector, also disconnecting and reconnecting it after cleaning the contacts, but without success. I also tried quick-freezing various parts of the board with liquid nitrogen, but that didn't affect the blinking (this is why I say that the relation between the flicker and the temperature is just an assumption... I mean, I cooled almost everything under 0°C and it was still flickering).
Then I read online about people having screen flickering problems after software updates or ROM changes, so I'm a bit confused. Do you think that this problem could be software-related? Maybe the display drivers in the kernel are messed up? I would really like to flash a clean ROM but I'm not feeling good about that, I don't know what device this really is... On CPU-ID it shows an MT8312 platform, but the MediaTek Flash Tool identifies the chip as an MT6582 (uhm...). I'll attach a couple of pictures of the device with the CPU-ID screenshots. I'll also attach the screenshots from a genuine SmartPad 7.0 S2 3G that a friend of mine has (they're the ones taken with a camera capturing the tablet screen).
So I'm asking a more expert person, how should I proceed? Maybe I can backup the whole MMC and try to flash something? What ROM should I flash then? Or would it just be a waste of time because it's certainly hardware-related? If so, is there something I can do with the board? Maybe I can try to reflow the SoC or the display controller IC (in case it's not integrated in the SoC) with an hot-air gun?
Any suggestion will really be appreciated. Thank you very much in advance and sorry for my english if I made any mistake, and also sorry for the long post.
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Related
A few weeks ago my Sensation screen turned to colorful pixel snow. After opening the sense lock ring and flipping the main screen for a few times it became ok. A week later it went back to the snowy screen permanently.
I went to recovery and re installed the Rom (revolution 6.80) and the problem was solved. A week later I got the snowy screen back, but now the snow appears the very first moment the device is powered on.
Due to the face I had airdroid on the device I managed to connect it to the computer and see the mobile screen on the computer and it looked as if everything is ok, I could see the sense and all the screens and operate all the applications by looking at the computer and touching the snowy screen.
I bought a new screen and connected it instead the original and I still got snow....so I know it's not a screen problem.
I do not have warranty on the device and local labs will charge half the price of the device for fixing it, so I prefer to find out what's the problem and but the parts myself and replace them.
Anyone has any experience with such a problem and fixing it?
Thanks a lot
Try using a blower, those that people use to blow off dust, blow off every spec of dust you can see on your device, clean the connectors of the screen too.
Then, try installing a rom which is not ARHD, and test it out. If all these doesnt work, it might be your GPU hardware is faulty.
I already cleaned all the connection and checked that everything is connected correctly but it didn't help.
Do you know where the gpu seats? maybe if I knew what it looks like i could check problems around it or replace it.
No one knows how to solve the snow problem? :crying:
That's it? the device is dead? I used it only for one year...
Can you take a photo of it and post it?
Then we know exactly what you're talking about
sromer said:
Can you take a photo of it and post it?
Then we know exactly what you're talking about
Click to expand...
Click to collapse
Looks like that
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wow... I've never seen anything like that before. Hopefully someone else can help
maybe the connector of the lcd panel is disconnected a little bit.
I bought from Ebay defective Sensation, it has exactly the same problem.
Did you find what you HTC was wrong?
tanglang1 said:
Looks like that
Click to expand...
Click to collapse
That's what my screen looks like when the framebuffer memory allocation fails
Sultanxda said:
That's what my screen looks like when the framebuffer memory allocation fails
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Click to collapse
I'm also having the same snow problem on my HTC Amaze, for the above i assume there's no fix to this as i was about to purchase a new screen.
This phone is a complete lemon so perhaps it's a blessing
Seen that 2 days ago at a friends phone. No solution oder fix for that?
Hi,
I got this weird problem and im not sure is this a hardware problem or not. For example. when using menus with white background, the background goes partly blue. Sometimes the graphic error is only blue lines in some part of the white background.
but when checking one option in same menu the background turns normal or atleast there is some change in the background. So these errors reacts only when changing options. And theyre always in the same position when going the same menu.
Also when using camera. the view is messed up a bit. there is a clear line somewhere in the picture when going dark to bright. With my english its hard to explain especially when i dont have any idea what is causing this problem.
Below are two attachments that explains the problem much clearer than i can write:
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And before you ask. Yes, it has dropped and i have replaced the glass. But i got it with broken glass so i dont know was it like this before it dropped and the previus owner couldnt tell either.
Any possible solutions?
Thank you in advance!
Sounds like a hardware issue, just for the heck of it I would open it up and check the ribbon cable to the digitizer/screen, it could be loose.
Pp.
Checked it. Same problem. Tried to change brightness level, hard reset, rooting etc with no luck.
Its just so weird that in some situations the screen looks totally normal. only these few situations cause errors in the screen.
Hmmm, there are dialer codes that are used on phones that run a series of tests to check screen performance and output, don't know if this can be done on a tablet, but I would research it.
The only other time I heard of this was on a phone that recovered from falling in a toilet, the phone was dismantled and cleaned and assembled and it worked fine for over a year, the only glitch was an occasional color spasm on the screen similar to what you discribe.
Pp.
Thanks for the tip! Need to look for those codes when i get back home. I removed the logic board and cleaned it with denat. alcohol. No visible damage at least! trying to assembly it back later today. I decided to order a new LCD flex cable. Its the cheapest part to change.
No luck with the codes i found. after cleaning still same graphical problems. Now i can only wait the new flex cable and hope it will fix those errors.
Anyways thanks for replys and suggestions. :good:
Good day my friends,
my OPO from the very first batch in early june 2014 works perfectly. My second One, bought in september 2015, worked also very well. Until yesterday when I noticed that the display is completely full of horizontal lines, all aligned with the same space and the same size.
I thought it could be a problem with CM13 and updated to the latest release, but the issue persisted. I updated to the latest firmware because it made a lot weird stuff in the past - nothing changed. I read about some DPI problems when setting up a custom DPI in settings, you should set the same DPI in your build-prop. Did it and nothing changed. Finally I switched back to the CM12.1 release candidate from november 2015 and .... the lines were gone. I was very happy, but confused because it seems I was the only one having this problem.
2 hours later I was randomly checking my phone... and the lines were back. They started to get visible alongside the upper edge, in the statusbar region. After some time the whole screen is full with lines. After some time with display off there is a big shift and you can see everything double (unfortunately no image of this). I got the doubt it may not be software related and made a screenshot and sent it to my other OPO. And yes, there weren't any lines. So I think it is indeed hardware related, but I was not able to find something similar. Many results for this big line at the bottom which occured in late 2014, but nothing similar to my problem.
Before asking for a RMA I'd like to post this here, maybe someone knows what is wrong. I really hope it is not hardware-related and I can refuse to use the (not well working) RMA and support of OnePlus.
And NO, my device didn't fall down or something else. To be honest it isn't really in use, I just use it an hour a day
I made some images for you to see my problem. Maybe you saw something similar on the internet. Thank you in advance.
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After some further investigation I found an angry comment which states "horrible horizontal lines". Moreover it seems to be clearly a hardware defect when a LCD panel shows lines..
Go for RMA, faulty connector pins. Maybe from the factory, maybe from yours. Higher air moisture can produce chalk on the pins too, even while they plugged in
hello fiz:ik,
can you please tell me that how this issue was resolved? as i am having exactly same issue with my OP3T.
Hello everyone, this is my first post in xda so I apologize if there's any error.
Everything started a couple of days ago, when I found a stuck pixel on my s6 AMOLED display. I had this phone for over a year now, and it always worked flawlessly. I installed some apps to fix this stuck pixel (it was kinda red) and first I spotted some new ones across the screen, but then after a couple of tries they disappeared. Next day in the morning, I wake up to see that my screen is kind of yellowish tinted, whites are not white but more like yellow and what bothers me the most, blacks are no longer pure black, because they have back light like if it was an LCD instead of an AMOLED.
I tried lots of things and realized that when the screen is displaying mostly white colors it seems to be alright, but if something dark appears everything automatically switches to this yellowish tint.
I already:
Wiped cache
Factory reset
tried with some "Burn in Fix" apps
Changed display mode
with no luck.
I found out that even in the boot logo and in recovery the problem persists.
I'm running 7.0 Stock, no root, no recent drops / water drops.
Please, help me, I miss my old gorgeous display :c
Some images of my problem:
This is what a pure Black wallpaper looks like:
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Its hard to see, but whites are yellow tinted, at least more than before.
Please help
I'm going crazy, does anyone have an idea of what could be happening ?
Your display seems to have degraded. I recently sold my 2.5yr old S6 which was fine as far as display is concerned; your issue seems to be rather strange for just a year old device. Do you by chance regularly use very high brightness level?
I don't have any solution that I can think of; but curious to understand the cause.
On a side note though, see if Samsung Service Centre is ready to take a look at your device and fix it (if this is due to any display connectors being lose)
madnav said:
Your display seems to have degraded. I recently sold my 2.5yr old S6 which was fine as far as display is concerned; your issue seems to be rather strange for just a year old device. Do you by chance regularly use very high brightness level?
I don't have any solution that I can think of; but curious to understand the cause.
On a side note though, see if Samsung Service Centre is ready to take a look at your device and fix it (if this is due to any display connectors being lose)
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Hello, and sorry for the delay, strangely i haven't got any notifications about this topic so i thought no one replied.
I regularly use medium to low brightness level, but now that I have this problem I have to use it on high or max because otherwise its hard to see anything, especially while reading.
Clezio said:
Hello, and sorry for the delay, strangely i haven't got any notifications about this topic so i thought no one replied.
I regularly use medium to low brightness level, but now that I have this problem I have to use it on high or max because otherwise its hard to see anything, especially while reading.
Click to expand...
Click to collapse
It's highly likely that your display/display connector has gone wrong. Visit Samsung Service Centre to get it checked; they will check for free and quote you for repairs if it is something that can not be fixed without parts replacement.
Been trying to get my Note 20 Ultra working again after a screen replacement and the phone went BSOD. Screen was tested and confirmed working. So I put in a new motherboard. Screen still doesn't work. With no touch capability how am I suppose to set it up? *I did try ODIN, but failure since I can't put it in the correct mode.* **I took this picture off my TV screen since it does put video out with a USB C to HDMI cable**
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I'm sorry I can't be of any help with your touch screen not working, but I wonder if you or someone might be able to help me? Your post is the only place I've seen the screen I'm getting after replacing the motherboard in my Note 20 Ultra, and I can navigate using the touch screen, but I don't know what steps to take to get the regular OS to install and function from this screen.
Woehoss said:
I'm sorry I can't be of any help with your touch screen not working, but I wonder if you or someone might be able to help me? Your post is the only place I've seen the screen I'm getting after replacing the motherboard in my Note 20 Ultra, and I can navigate using the touch screen, but I don't know what steps to take to get the regular OS to install and function from this screen.
Click to expand...
Click to collapse
Have you tried tapping the various buttons?
What caused the display to fail?
Woehoss said:
I'm sorry I can't be of any help with your touch screen not working, but I wonder if you or someone might be able to help me? Your post is the only place I've seen the screen I'm getting after replacing the motherboard in my Note 20 Ultra, and I can navigate using the touch screen, but I don't know what steps to take to get the regular OS to install and function from this screen.
Click to expand...
Click to collapse
I have heard that it will pull the necessary data down if your sim is in. But I can't verify that until I get a working screen in it. I'll keep digging...
blackhawk said:
What caused the display to fail?
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Click to collapse
I'm hoping that my replacement screen is just bad and they'll swap it. Apparently BSOD is becoming a common thing with this phone. Even my parts supplier is asking me. I want to test my old board, but I lack knowledge to do so (and probably equipment as well.) From what I can say is that it affects all things screen related. So no picture, no touch and no S-Pen. So it could be a chip problem.
Replacement parts must be the exact same part number. Some of the model variants parts are not interchangeable!
Out of circuit assemblies are also susceptible to ESD damage. ESD protocols should be followed when handling these assemblies. At the very least wear all cotton and raise room humidity to 50%.