Database Users

Question about HD2 screen and digitizer change

Hello,
i cracked my HD2 screen (digitizer), i purchased new one, but the cracked one was working and i was not in a hurry to change it. After a minor drop, the LCD touch screen cracked under the cracked digitizer and now i have black screen...
Now also i have to purchase LCD screen, but i saw that there is ready to use screen+digitizer(and of course more expensive than screen and digitizer alone) .
My question is - what will be easier to change - ready to use digitizer + screen, screen and digitizer alone or there is no difference. I'm asking this, because I'm wondering should i sell the digitizer (if i can) and buy the ready to use screen+digitizer, or to purchase the screen and to use it with the already received digitizer.

If you can afford it you have to go with the all in one. Too much can go wrong during assembly and you should avoid it if you can.

yup, separating and installing them separately is a pain in the arse, its always better to do it in the one job if you can afford the initial high cost. My LCD panel needs replaced due to light bleeding, but I cant be arsed, the digitiser is likely to fail in the future anyway being an HD2 so ill wait and just do the two of them together.

OK, thank you.
I've watched 2 or 3 "how to change digitizer" videos. Is there a video for changing the lcd+digitizer or its the same as the digitizer change? I have to disassemble the whole phone to change the digitizer...

LexHammer said:
OK, thank you.
I've watched 2 or 3 "how to change digitizer" videos. Is there a video for changing the lcd+digitizer or its the same as the digitizer change? I have to disassemble the whole phone to change the digitizer...
Click to expand...
Click to collapse
there is a vid somewhere, ill have a look later, but essentially yes. you need to remove the whole lot, the only difference between doing them both and doing them separately is that the two panels are stuck to each other, and its that process of separating or putting back together that's really tricky and people have ended up damaging one or the other trying it.

What about the difference in the EU and T-Mobile versions, like in the digitizer (soldering and insertion) Is there a difference too, if i take the whole "pack" (LCD + Digitizer) and what should i look for if there is a difference?

LexHammer said:
What about the difference in the EU and T-Mobile versions, like in the digitizer (soldering and insertion) Is there a difference too, if i take the whole "pack" (LCD + Digitizer) and what should i look for if there is a difference?
Click to expand...
Click to collapse
If you buy combo(LCD+digitizer) there's no problem to replace it to whatever version of HD2 you own: combo is interchangeable on both versions!

OK, Thank you!
I'm asking because i asked some buyers on ebay, and they told me "Sorry, my friend, but this is for T-mobile version" But on the pictures, they are all the same.

I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA

But on a already assembled combo pack (LCD + digitizer) how to know if the digitizer is EU version, beside the T-mobile logo.

hengsheng120 said:
I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA
Click to expand...
Click to collapse
I doubt it's a relationship between digitizer and g-sensor/proximity sensor...
---------- Post added at 02:37 PM ---------- Previous post was at 02:36 PM ----------
LexHammer said:
But on a already assembled combo pack (LCD + digitizer) how to know if the digitizer is EU version, beside the T-mobile logo.
Click to expand...
Click to collapse
There's no way to figure out this...

bib*oops said:
I doubt it's a relationship between digitizer and g-sensor/proximity sensor...
---------- Post added at 02:37 PM ---------- Previous post was at 02:36 PM ----------
There's no way to figure out this...
Click to expand...
Click to collapse
Let me clarify that; my hd2 EU first had its digitizer+LCD replaced with a TMOUS version, and the proximity sensor stopped working,
then the the mobo was replaced by a tmous mobo in the same EU housing and the accelerometer and magnetometer does not work properly (accelerometer works in wm6.5 but not android), but the proximity sensor worked.
It's not just me having a hardware replacement problem, there's a significant amount of posts by other users about replacement parts not working properly. So everyone should be at least very cautious about using them because replacing with other parts may cause other problems.

my buddys HD2's touch screen suddenly stopped working.
he gave me the phone for $50.
i guess ima have to do lil work

I need some help with choosing the combo
Which one should i take and why on one the second item there are those big cable-like things.
N1 - http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
N2 - http://www.ebay.com/itm/NEW-lcd-Tou...ltDomain_0&hash=item3a67e44659#ht_2175wt_1344
Will i need to solder them together or they are already soldered (welded junction or whatever)
Thank you!

Anybody?

LexHammer said:
I need some help with choosing the combo
Which one should i take and why on one the second item there are those big cable-like things.
N1 - http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
N2 - http://www.ebay.com/itm/NEW-lcd-Tou...ltDomain_0&hash=item3a67e44659#ht_2175wt_1344
Will i need to solder them together or they are already soldered (welded junction or whatever)
Thank you!
Click to expand...
Click to collapse
Both versions are OK, but I would choose the first one.
There's no need for soldering(vers. 2): it's more like a packaging thing in order to get it mounted on chassis.

hengsheng120 said:
I had my EU hd2 digitizer changed too when it was broken, and when it was changed to a tmous replacement, they couldn't get the promixity sensor working.
Now I dunno if that's a defect from the screen or because it's a incompatility problem, but a further gsensor-working-in-wm6-but-not-in-android-problem in my other replacement mashup hd2 hybrid EUTMOUS frankenstein phone suggests that some parts may not be interchangeable.
You should just make sure that it's a EU digitizer so you won't run into further problems.
Sent from my HTC HD2 using XDA
Click to expand...
Click to collapse
I guess its because you/they lost the little glasses that connect the display and the sensor.
Its easy to loose them as they fall out after you take the screen from the housing.
I lost them a few seconds ago and think that i know what wont work when i reassemble
@topic
there is generally no problem removing display from touchscrren. just make it hot with a fan or oven ~80°C is okay. and with a flat knive or iron-wire go for the glue.
If you do this you need new glue-tape. Mostly you get this from china very cheap but takes a while.
If your screen is broken now i would recommend to take a combi pack as you have no glueing, no alignment problems and so on.
its not very hard but kills some time and nerves ;D

OK, so lets do a round up, before i make the purcahse, so I'm sure i will make the right choice.
I'm going to buy this one http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
because its already assembled and much easier to use and IT WILL FIX on my EU version of the phone (Not US T-Mobile)
Only YES or NO will be enough

LexHammer said:
OK, so lets do a round up, before i make the purcahse, so I'm sure i will make the right choice.
I'm going to buy this one http://www.ebay.com/itm/LCD-and-DIG...ccessories&hash=item43adebdc7d#ht_3076wt_1110
because its already assembled and much easier to use and IT WILL FIX on my EU version of the phone (Not US T-Mobile)
Only YES or NO will be enough
Click to expand...
Click to collapse
YES

bib*oops said:
YES
Click to expand...
Click to collapse
The Eu-HD2 is soldered isnt it? This version, from the picture, is the pluged version....
Im not sure because if you change the display also the connector type could be irrelevant.
But if this is the screen from Tmous-HD2, i remember that it was a bit bigger? Is it just the housing or also the display?
=>
Dont buy before this is clear!
(i would open my hd2, look what connector type is inside and buy that one just to be sure...)
And some advise: Try to glue the flex cable from the touchscreen(the one that goes under the end call button reallly close to the display)
This could help to improve the life-span of the cable as its not flexed every time you push the button(try when you hold it in your hands by putting the buttons in the frame and push it, if it flexes the cable fix that!!!)
Otherwise the cable will break one day and the wires will disconnect=> typical problem of not responding touchscreen

[Q] Nexus 7 with a broken screen

Hello everyone, My nexus 7 has a crack-line in the screen and only one half of the touch screen is responding, My question is: Where can I buy a new screen + 'digitizer' (Think that will be needed no?!) for a cheap price?, And is it hard to fix it myself? The warranty wants me to pay 233 Euro (303 Dollar) to fix the screen, But man... That's almost the price for a new unit (249 Euro), (323.87 Dollar). I hate Asus now!

GianniDPC said:
Hello everyone, My nexus 7 has a crack-line in the screen and only one half of the touch screen is responding, My question is: Where can I buy a new screen + 'digitizer' (Think that will be needed no?!) for a cheap price?, And is it hard to fix it myself? The warranty wants me to pay 233 Euro (303 Dollar) to fix the screen, But man... That's almost the price for a new unit (249 Euro), (323.87 Dollar). I hate Asus now!
Click to expand...
Click to collapse
You can buy an assembly on Ebay for around 65 Euros. They maybe surplus stock, but work just as well. Changing it is not that hard. All you need to do is look for a a tutorial on youtube, and follow the instructions closely.
http://www.youtube.com/watch?v=bjh0H6SZHRM
http://www.youtube.com/watch?v=EJmfhiENaOs

graphdarnell said:
You can buy an assembly on Ebay for around 65 Euros. They maybe surplus stock, but work just as well. Changing it is not that hard. All you need to do is look for a a tutorial on youtube, and follow the instructions closely.
http://www.youtube.com/watch?v=bjh0H6SZHRM
http://www.youtube.com/watch?v=EJmfhiENaOs
Click to expand...
Click to collapse
I could only find a screen replacement for about 95 Euros on Ebay....., I find this is a bit much :/
But, thankyou!

If just the glass is cracked, I believe you can use a heat gun, and a lot of patience to just replace the glass for 30$
Sent from my Nexus 7 @1.60 GHz on Stock 4.2.2

GianniDPC said:
I could only find a screen replacement for about 95 Euros on Ebay....., I find this is a bit much :/
But, thankyou!
Click to expand...
Click to collapse
Check this out. I bought once from this guy, and he seems OK.
http://www.ebay.com/itm/For-Asus-Go...ablet_eReader_Accessories&hash=item3381f7dbe2
---------- Post added at 10:45 AM ---------- Previous post was at 10:43 AM ----------
IRX120 said:
If just the glass is cracked, I believe you can use a heat gun, and a lot of patience to just replace the glass for 30$
Sent from my Nexus 7 @1.60 GHz on Stock 4.2.2
Click to expand...
Click to collapse
That's also very true, especially the word "patience". I'd add that you should have experience working on this before. Otherwise, 99 times out of 100, something would go wrong. But since you have nothing to lose anyway, why not take a crack at it and have fun while doing it?

graphdarnell said:
Check this out. I bought once from this guy, and he seems OK.
http://www.ebay.com/itm/For-Asus-Go...ablet_eReader_Accessories&hash=item3381f7dbe2
---------- Post added at 10:45 AM ---------- Previous post was at 10:43 AM ----------
That's also very true, especially the word "patience". I'd add that you should have experience working on this before. Otherwise, 99 times out of 100, something would go wrong. But since you have nothing to lose anyway, why not take a crack at it and have fun while doing it?
Click to expand...
Click to collapse
Yes but only one half of the touch screen is responding (Above the line) the other half is not responding to touch input, So don't I need a new digitizer too? And the Ebay link, I can't seem to order that because I can only choose Canada or the VS and I live in Belgium!
PS: Here is a picture of the unit: https://www.dropbox.com/s/kqjaz9zuy2ppep2/IMG_20130628_121635.bmp

Hi there,
it seems that the digitizer (glass with touch layer) is broken. The LCD seems to be ok. You have four ways to proceed:
1. Sell the unit and wait for the next Nexus 7 (but you'll only get around 50-70US$ for your broken unit) - RISK OF NOT GETTING A GOOD PRICE
2. Let it be fixed by a pro and pay 150US$ or more for that - RISK OF PAYING TOO MUCH
3. Get a LCD/Digitizer combo (often not originals) from Ebay (click for the right search on Belgium's ebay) or Aliexpress and replace the whole unit yourself. That costs around 75 to 90US$ at the moment. It's relatively easy to do it by yourself. If you're not left-handed you can fix that in 30 minutes, with only a little screwdriver and a guitar plectrum. See here how it is done: http://www.youtube.com/watch?v=OtIFkIKtYf8 - RISK OF GETTING A BAD REPLACEMENT COMBO, NEARLY NO RISK TO FIX IT YOURSELF
4. Buy only the digitizer (glass with touchscreen functionality for 30US$ from aliexpress or Ebay (click for the right search on Belgium's ebay) and try it the long way. For that you have to separate the broken digitizer from the working LCD. They are glued together, but there is a way to remove it. See my posts here: http://forum.xda-developers.com/showthread.php?t=2337288 and in the linked thread. Be very carefull and take your time if you want to do this. Read all the related posts and only order the glass after successful separation, cleaning and test (you don't want a digitizer glass after you ruined the LCD...). This whole operation will take you some time and preparation. Beside the digitizer you'll need some cleaning liquid (around 5$) and some adhesive (glue or tape) to stick the LCD back to the glass. I think it's possible to glue it only on the edges, but I am still waiting for my glass to try it out... - RISK OF GETTING A BAD REPLACEMENT DIGITIZER, TO LOOSE A LOT OF TIME AND RISK OF RUINING THE LCD WHILE TRYING TO SEPARATE OR CLEAN IT (WHAT WOULD LEAD TO STEP 3. AGAIN)
Make your choice!
Ah, there is also choice Nr. 5.: Give it away for free. NO RISK!

Glass cracked, LCD + touch work, 2/3 home buttons do not work - What to replace

Dropped the phone, boohoo, glass shattered. lcd works fine and so do all touch areas. But the home button and back button do not work along the bottom. My overview/panels button still works.
So what do I need to replace? Will a simple glass replacement/Digitizer on eBay for about $10 restore function to the home and back button?
(as a side note - I think I can root the device + install permanent on screen action buttons right? The free stuff from Google play isn't cutting it)

happened to me a few months ago, I bought full lcd + digitizer from alliexpress. I believe it woul be very hard to separte the display from the screen/digitizer

Good to know they're available. I somehow got a tiny corner chip on mine (no idea how). Thankfully it's small and low enough that it doesn't affect buttons or screen.

Would this basically be it?:
Seems pretty simple as long as I can get my hand on a heating gun.

there is an error on the video

TheDethEgineer said:
there is an error on the video
Click to expand...
Click to collapse
https://www.youtube.com/watch?v=MRr3x3xuMxc&t=231s
Well, I watched it again, and it does look like the lcd was replaced as well. Doh!
As far as the relacement - does this seem about right? - https://www.aliexpress.com/item/100-new-LCD-screen-display-Touch-digitizer-For-Letv-LeEco-Le-Pro-3-X720-gold-color/32756701256.html?spm=2114.01020208.3.187.B9SO3H&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10130_10068_10136_10137_10138_10060_10062_10141_10056_10055_10054_10059_10099_129_10103_10102_10096_10148_10147_10052_10053_10050_10107_10142_10051_10143_10084_10083_10080_10082_10081_10110_10111_10112_10113_10114_10078_10079_10073_10070_10123_10124-10102,searchweb201603_6,afswitch_1,ppcSwitch_2_ppcChannel&btsid=93cb0b62-e89a-46e2-9448-1f84f8956bad&algo_expid=e9efba97-fe51-4502-b6de-1af06e738566-0&algo_pvid=e9efba97-fe51-4502-b6de-1af06e738566

stevedawg85 said:
https://www.youtube.com/watch?v=MRr3x3xuMxc&t=231s
Well, I watched it again, and it does look like the lcd was replaced as well. Doh!
As far as the relacement - does this seem about right? - https://www.aliexpress.com/item/100-new-LCD-screen-display-Touch-digitizer-For-Letv-LeEco-Le-Pro-3-X720-gold-color/32756701256.html?spm=2114.01020208.3.187.B9SO3H&ws_ab_test=searchweb0_0,searchweb201602_5_10065_10130_10068_10136_10137_10138_10060_10062_10141_10056_10055_10054_10059_10099_129_10103_10102_10096_10148_10147_10052_10053_10050_10107_10142_10051_10143_10084_10083_10080_10082_10081_10110_10111_10112_10113_10114_10078_10079_10073_10070_10123_10124-10102,searchweb201603_6,afswitch_1,ppcSwitch_2_ppcChannel&btsid=93cb0b62-e89a-46e2-9448-1f84f8956bad&algo_expid=e9efba97-fe51-4502-b6de-1af06e738566-0&algo_pvid=e9efba97-fe51-4502-b6de-1af06e738566
Click to expand...
Click to collapse
Yeah that is the one you need
That same seller sent me a message after I paid for the screen, he told me that there was low stock and it will take them about 6 days to restock, I decided to cancel the order and buy it from another seller but it was the same story, there was no stock and it took them around a week to send the screen.
I placed the order on Jan 03, the screen was shipped on Jan 09, and it was delivered on Jan 16.

My phone on stock rom has an issue where the left edge does not work. LeEco said it was a known issue. I literally cannot seek a YouTube video to time 0:00 because it stops responding at about 0:14.
Do you have any issue with YouTube seeking to the beginning with the new screen?

dweekie said:
My phone on stock rom has an issue where the left edge does not work. LeEco said it was a known issue. I literally cannot seek a YouTube video to time 0:00 because it stops responding at about 0:14.
Do you have any issue with YouTube seeking to the beginning with the new screen?
Click to expand...
Click to collapse
Remove any screen protector

TheDethEgineer said:
Remove any screen protector
Click to expand...
Click to collapse
That has no effect for me.
If it is a hardware issue, I would ask LeEco to exchange it or I'll just replace the screen myself. LeEco tells me it is a known issue that I have. Now I am questioning if others have the same issue as me.
Can I assume nobody else has an issue with the screen/digitizer on the left edge, such as when seeking YouTube videos to the beginning?

replacement experience
Hi all,
For those who have change the display for the x720/x727, Have you found any significant difference from the original display? I need to change mine, and I have seen one on aliexpress. Sorry but I can't post the link because of the 10 post limitation.
It has many reviews, being almost all of them positive. But someone tells that there is no light on the capacitive buttons. I'd want to know if you have experienced this issue. Also, in your opinion, has the replacement the same brightness like the original one? Is as responsive as the original one?
Many thanks.

Kovayashy_Maru said:
Hi all,
For those who have change the display for the x720/x727, Have you found any significant difference from the original display? I need to change mine, and I have seen one on aliexpress. Sorry but I can't post the link because of the 10 post limitation.
It has many reviews, being almost all of them positive. But someone tells that there is no light on the capacitive buttons. I'd want to know if you have experienced this issue. Also, in your opinion, has the replacement the same brightness like the original one? Is as responsive as the original one?
Many thanks.
Click to expand...
Click to collapse
For me the replacement one looks a bit better than the original. Everything works fine.

TheDethEgineer said:
happened to me a few months ago, I bought full lcd + digitizer from alliexpress. I believe it woul be very hard to separte the display from the screen/digitizer
Click to expand...
Click to collapse
Can you give me the link of that seller?
Thanks

RedWine71 said:
Can you give me the link of that seller?
Thanks
Click to expand...
Click to collapse
It seems that the item is no longer available but you can search for "X720 lcd screen" and you can find many options Good luck :good:

Hi, i broke my digitizer on pro 3 Gold. Can i buy only digitizer or i must buy lcd+digitizer?

Screen cracked for no reason

I'm seating at my desk with my phone on my side over the mousepad and after hearing a very faint "pop" sound I notice there is a very clean single crack running from the top to the bottom of the screen. The phone was bought a month ago, never dropped, and it was not even being touched when it cracked. What could be the reason? Some type or thermal stress or just a manufacturing defect?
At the moment I'm living in a country without official Xiaomi support (Japan), is there anything I can do about it?
I'm quite surprised by what happened and I have never heard of a screen on a new phone cracking for no apparent reason.
Pictures:
imgur .com/a/Q5Lon

I once put a Sony MP3 player at the window, in winter. At the morning it was cracked. I gotowe beating from my dad for breaking the christmas gify a dat after receiving it. Still wish these days came back though.

It's probably a manufacturing defect. Where did you buy the phone? You could try explaining the situation, but I think it would be a huge hassle, just take your loss and spend $30 on a new display.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20171205083915&SearchText=mi+5x+lcd

tinyXperia said:
It's probably a manufacturing defect. Where did you buy the phone? You could try explaining the situation, but I think it would be a huge hassle, just take your loss and spend $30 on a new display.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=SB_20171205083915&SearchText=mi+5x+lcd
Click to expand...
Click to collapse
Replacement screens usually look rubbish and have ghost touches in the digitalizer

Thank you for the suggestions.
xabierd said:
Replacement screens usually look rubbish and have ghost touches in the digitalizer
Click to expand...
Click to collapse
I need only the digitizer, the LCD itself looks fine. Would it still not work well? I have never replaced a digitizer (or a screen) by myself, but on such a cheap phone I may as well try. Or is it an almost impossible task and I should just replace the whole screen assembly?
Also,isn't there a software setting for calibrating the digitizer? Using it can't I get the original performance?

I bought a €20 full hd screen for my Ascend P7 and it looked the same as the original. $30 is a normal price for a phone LCD, only OLED displays are much more expensive (another reason to avoid OLED screens on phones)
---------- Post added at 09:43 AM ---------- Previous post was at 09:40 AM ----------
xabierd said:
Replacement screens usually look rubbish and have ghost touches in the digitalizer
Click to expand...
Click to collapse
nexflatline said:
Thank you for the suggestions.
I need only the digitizer, the LCD itself looks fine. Would it still not work well? I have never replaced a digitizer (or a screen) by myself, but on such a cheap phone I may as well try. Or is it an almost impossible task and I should just replace the whole screen assembly?
Also,isn't there a software setting for calibrating the digitizer? Using it can't I get the original performance?
Click to expand...
Click to collapse
Not recommended, you save maybe 20$, but you still risk breaking your screen and having to wait another 3 weeks on a new one.
watch this to see how it works and decide for yourself: https://www.youtube.com/watch?v=z9drzO9hO_U

SM-T580 Screen flickering problem

Hi guys,
We have a bunch(200) of Samsung Galaxy Tab A 10.1 (wifi) running Marshmallow on firmware: MMB29K.T580UEU1APF5.
About 10% of the tablets have been starting to make this trouble after 3-6 months of installation.
Actually it seems pretty random and they are installed in different buildings.
They all have twrp installed, rooted and running xposed framework.
This is a really big concern for us.
I would like to know if anybody had this problem in the past.
I linked a video in attchment.
EDIT: Here is the video of it:
https://www.youtube.com/watch?v=54DCZt9i49M&feature=youtu.be
Thanks in advance
David

Edit guys i uploaded the video on a youtube channel.
We noticed that once this problem occured, sometimes the flicker stops, but there are white lines where white text is present in the interface.
I will upload an other video showing the lines being permanent on the screen after the flicker problem occurs.
We sent 4 of them to samsung and they told us that the motherboard needed to be changed and that the screen/display had no problem.
We did change the board on one of the unit and the problem is still there.
I saw a couple of post reporting this problem, it would be fun to know what is causing this problem.
We are currently suspecting the TWRP recovery, so we reflashed the stock recovery.img on the units that are not having the problem at the moment and hope this will not happen again.
Thanks in advance for your help

Here is the other video I was talking bout:
https://youtu.be/OonoNfWT5ZE
I joined a picture of my tablet when I put it in download mode, the ghosting is pretty intense on that one.
When I swipe the ghosting is less intense because it changes the background color.
We have been using samsung tablets for the last 6 years and this is the first model of tablet that does this.
I think Samsung cheaped out the quality of their screen and when they stay on the same page for a long period of time it seems to ghost very easily on this model.
Here are the tablets we used in the past and had no screen problem yet:
Samsung galaxy Tab 2 10.1 PLS TFT capacitive touchscreen, 16M colors
Samsung galaxy Tab 4 10.1 TFT capacitive touchscreen, 16M colors
Samsung galaxy Tab A 9.7 TFT capacitive touchscreen, 16M colors
Samsung galaxy Tab A 10.1 PLS LCD capacitive touchscreen, 16M colors (The one we are using right now having the problem)
Is it the PLS LCD being cheaper then the other screen we used in the past?

This is the LCD problem, not mainboard. Since you have a bunch of them, it's very easy to verify by swapping mainboard and LCD.
Use a working LCD to verify mainboard.
Use a working mainboard to verify LCD. In your case, swapping a working mainboard and the vertical lines are the same as old mainboard, you know this is a defective LCD. It takes only 5 minutes to swapping mainboard.

Beut said:
This is the LCD problem, not mainboard. Since you have a bunch of them, it's very easy to verify by swapping mainboard and LCD.
Use a working LCD to verify mainboard.
Use a working mainboard to verify LCD. In your case, swapping a working mainboard and the vertical lines are the same as old mainboard, you know this is a defective LCD. It takes only 5 minutes to swapping mainboard.
Click to expand...
Click to collapse
Yes this is what we did and in fact the LCD is the problem.
We send 4 of them to Samsung, and they told us it was the mainboard.. which is clearly a lie.
But since the tablets have been rooted they don't want to repair the units on their own charge, which we were awared of.
They were asking 200$ to repair the unit ... which is almost the price of the tablet.
I really think that this lcd is very cheap and that we will need to close the screens every day during a certain period of time to avoid this problem on this generation.
But this should not happen..
Have any advice?
thank you

This whole LCD assembly is only around $61 from AliExpress
https://www.aliexpress.com/item/For...29-42b1-8329-e12874b332ad&transAbTest=ae803_5
Cheaper if you know how to remove the LCD frame and reuse the home button, this one is only around $42
https://www.aliexpress.com/item/New...29-42b1-8329-e12874b332ad&transAbTest=ae803_5
It takes me only under 15 minutes or less to change the LCD assembly. This is OEM part as Samsung orders parts from China, don't worry about fake parts as all Samsung parts are from China
---------- Post added at 01:12 AM ---------- Previous post was at 12:58 AM ----------
IET_DEMO said:
They were asking 200$ to repair the unit ... which is almost the price of the tablet.
I really think that this lcd is very cheap and that we will need to close the screens every day during a certain period of time to avoid this problem on this generation.
But this should not happen..
Have any advice?
Click to expand...
Click to collapse
Samsung policy is they don't fix rooted tablet ( Knox count is more the 1 ) unless you agree to change the mainboard . It's a no point to me, flash back the official firmware, root will be gone but the Knox count won't go back to zero.
You should change LCD or setting the screen off after 30 minutes to prevent damages due to permanent ON.
LCD is only around $60, why pay $200 to change it. They properly change both LCD and mainboard. Rooted tablet won't have display issue unless you use custom ROM.