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X220 T Display Problem

Posted: Sat Dec 22, 2018 9:04 am
by X-Man
Am experiencing problems with one of the household X220 tablets, where the screen has started to malfunction, and am unsure if it is the actual panel or the onboard graphics.

- Screen looks pixelated and psychedelic, and when showing monochrome colours like on the the windows 10 update page appears to be cycling through different colours.

- VGA output to an external monitor is normal.

Any thoughts or tips?

Many thanks!

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 10:18 am
by Thinkpad4by3
Ok so the graphics chip can probably be safely ruled out if VGA has normal output.

Can you take a small video of the problem because depending on what it looks like it could be the LCD or the LCD cable.

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 10:37 am
by X-Man
Thinkpad4by3 wrote:
Sat Dec 22, 2018 10:18 am
Ok so the graphics chip can probably be safely ruled out if VGA has normal output.

Can you take a small video of the problem because depending on what it looks like it could be the LCD or the LCD cable.
Thanks so much for you fast reply.

Here's a short clip -- hope it gives you some insight:

http://sendvid.com/at5pr5y0

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 11:08 am
by Thinkpad4by3
Honestly that could do either way. Put some pressure at various points around the bottom of the LCD. The controllerboard sits down there and if it is a LCD issue this might show some signs of correcting it.

Otherwise you might want to reseat the LCD connector and see if that does anything.

The last possibility is your X220T could have taken some LSD :lol:

Although given the video.....I can't safely rule out the Intel Integrated Graphics either....hmmm....

Lets see what others say first.

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 12:06 pm
by X-Man
Thinkpad4by3 wrote:
Sat Dec 22, 2018 11:08 am
Put some pressure at various points around the bottom of the LCD. The controllerboard sits down there and if it is a LCD issue this might show some signs of correcting it.
Yup, a few thumb presses slightly left of centre and the display is once again perfect.

For now!

Does this help you to narrow the problem down further? The controllerboard? I happen to have another x220t lying around i have used for spares if you think it is worth trying to replace . . . ??

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 12:18 pm
by Thinkpad4by3
X-Man wrote:
Sat Dec 22, 2018 12:06 pm
Does this help you to narrow the problem down further? The controllerboard? I happen to have another x220t lying around i have used for spares if you think it is worth trying to replace . . . ??
Given slightly left of center....that looks to put your finger right over the LCD connector. That leads me to think a bad connection, but the controllerboard could still be at fault.

The controllerboard is part of the LCD(and not replaceable)...your best bet to start with is to reseat the LCD connector. Then you probably want to swap the panels with your spare if that doesn't work. I'd bet its probably a controllerboard issue over a bad cable. The graphics chip is completely out of the question now...its fine. The cable is probably fine if the picture came up pushing there.

If you don't want to swap panels...you could probably install the panel with a piece of tape or two where your thumb was and just keep pressure on the panel given it comes back. There have been times where that has come in handy in the past. (*cough* T60p line problems *cough*)

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 1:24 pm
by X-Man
Thinkpad4by3 wrote:
Sat Dec 22, 2018 12:18 pm
Given slightly left of center....that looks to put your finger right over the LCD connector. That leads me to think a bad connection, but the controllerboard could still be at fault.

The controllerboard is part of the LCD(and not replaceable)...your best bet to start with is to reseat the LCD connector. Then you probably want to swap the panels with your spare if that doesn't work. I'd bet its probably a controllerboard issue over a bad cable. The graphics chip is completely out of the question now...its fine. The cable is probably fine if the picture came up pushing there.

If you don't want to swap panels...you could probably install the panel with a piece of tape or two where your thumb was and just keep pressure on the panel given it comes back. There have been times where that has come in handy in the past. (*cough* T60p line problems *cough*)
Thank you so much for your help troubleshooting this.

Unfortunately the one component not fully up to scratch on my spare is the panel, which has some ugly marks at the bottom.

And given that the problems have arisen on my 9-year old's machine primarily used for non-mission critical Roblox and Youtube viewing I am inclined to cross my fingers and wait to see if/when the issue reappears before taking it apart :D

But once again thank you very much for you invaluable assistance. Merry Christmas!

Re: X220 T Display Problem

Posted: Sat Dec 22, 2018 3:35 pm
by Thinkpad4by3
X-Man wrote:
Sat Dec 22, 2018 1:24 pm
And given that the problems have arisen on my 9-year old's machine primarily used for non-mission critical Roblox and Youtube viewing I am inclined to cross my fingers and wait to see if/when the issue reappears before taking it apart :D

But once again thank you very much for you invaluable assistance. Merry Christmas!
Well...that's why were here! :D