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Bad UXGA LCD?

Posted: Thu Oct 25, 2012 2:52 am
by BruceDickinson
I recently got a T60P with a Boe-Hydis UXGA LCD. Machine is in great condition. LCD is beautiful.

I got addicted fast and bought a second one--from a different seller--and wasn't so lucky this time. The screen displays a few horizontal lines of bright pixels toward the bottom--which go away when the screen is twisted a little (pull the left side, push the right). By reversing the direction of the twist I can make these lines appear and disappear at will.

It's the LCD itself that's going bad, right? If one of the experts here thinks it might be a cable issue instead, I'll open the screen assembly and re-seat the connections and/or replace the cable. But if that's no more than a remote possibility, I'll skip that job and just consider replacing the panel. (FWIW, re-seating the cable at the mobo makes no difference.)

Finally, does anyone think a panel in this condition might be rehabilitated? I kinda wonder whether the screen might benefit from a few days of being twisted a little in the "good" direction--sort of like traction. That's not a winning idea, right? (I ask this crazy question because when the laptop first arrived, I think it may have been a little "out of line." The base didn't seem to sit flush on a flat surface--almost as if it had been stored in an awkward position. The base sits flush now. Also, there are markings on the lid that might suggest that something was sitting on top of it, off-center, for some time.)

Thanks, as always, for any light you can shed.

Re: Bad UXGA LCD?

Posted: Thu Oct 25, 2012 4:42 am
by RealBlackStuff
Those lines are caused by bad row-drivers.
These are part of the electronics circuit, and are located in the white plastic strip along the short side of the LCD.
This stuff is "glued" in some way to the side and is slowly coming "unglued".
Since I don't know the specifics of the "glue" I don't have a better word for it.
Anyway, sometimes just putting a piece of tape around the edge on the left side (as seen sitting in front of the laptop) temporarily 'helps' for a while.
But sooner, rather than later, you'll need to replace the LCD.
Once it gets to that point, why not consider a fabulous, new UXGA LCD with LED-backlight?
PM me if interested.

Re: Bad UXGA LCD?

Posted: Fri Oct 26, 2012 4:51 am
by BruceDickinson
Thanks, Dominic. I appreciate the explanation. Some googling revealed that some folks have had some success jury-rigging pressure against the tab-bonds--or using conductive tape. But as you indicate, it's a losing battle.

Re: Bad UXGA LCD?

Posted: Tue Nov 13, 2012 6:42 pm
by BruceDickinson
An update...

So far, applying pressure has been winning the battle.

I wedged maybe a dozen playing cards in between the lid and the back of the panel on the lower left side. The horizontal lines are gone and don't reappear when I flex the LCD assembly. The fix may not last, but it's working perfectly for now.