Screen flickers, goes dim, on T42. Not GPU issue.

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argi · #1 Post by **argi** » Sat Mar 01, 2008 11:06 pm

Hi all,

The screen on my T42 recently started flickering and going dim, almost black. Under a bright light, I can barely make out that the screen is actually still on but that it's just not back lit. The flickering/dimming problem occurs only when I adjust the angle of the display. I can revive the display by either (1) pressing Fn F3 or (2) by pressing and releasing the display button located above the Access IBM button. Sometimes I have to slightly adjust the screen angle in order to get it back up.

This is not the much more common GPU issue, as I can still barely see the images on screen and I do not need to reboot to bring the screen back on.

I also don't think it's a backlight problem, because the screen works fine, so long as I don't change the angle of the display. The problem never happens without moving the screen on its hinges. Also, when the display comes back on, it's perfect (no red tinge, colors and brightness are fine etc.).

So I'm thinking that maybe the LCD connectors have come slightly loose, so when I move the hinges the screen goes off. But I don't have much (or any!) experience diagnosing screen issues.

Any other ideas???

Thanks!

goofyGAguy · #2 Post by **goofyGAguy** » Sat Mar 01, 2008 11:36 pm

Welcome to the forum argi. I would guess either a loose cable connection at the board, or the cable itself. Good luck.

ThaDon · #3 Post by **ThaDon** » Sun Mar 02, 2008 7:25 pm

I've had a similar problem on my T20, fault was the ribbon cable to the screen, over time the open and close actions broke the connections at certain angles.

#4 Post by **richk** » Sun Mar 02, 2008 7:39 pm

My vote is "bad cable"

argi · #5 Post by **argi** » Mon Mar 03, 2008 10:28 am

Thanks for the advice!

This should be fun... trying to find a replacement LCD cable in Argentina! I'll post an update if replacing the cable solves the problem

yaygabe · #6 Post by **yaygabe** » Sun Apr 20, 2008 4:21 pm

any progress here? having same problem

anyone else have news? is it a cable problem?

argi · #7 Post by **argi** » Sun Jun 08, 2008 11:39 pm

Well, I finally got around to replacing the LCD cable, which didn't solve the problem. The screen makes a slight "short-circuit" type noise when it flickers. I think I'm going to try replacing the inverter card next, unless anyone else has a better idea.

argi · #8 Post by **argi** » Fri Jun 13, 2008 5:01 pm

The solution was replacing the inverter card. The display works fine now.

Screen flickers, goes dim, on T42. Not GPU issue.

Screen flickers, goes dim, on T42. Not GPU issue.

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