Wierd ripple/jitter in corners of screen

[brikis98]

My setup at work:

An IBM Thinkpad T43 with an ATI x300 mobility running windows XP in a docking station hooked up via a VGA (D-sub) cable to this LCD.

For whatever reason, the top right and top left corners of the LCD will sometimes start jittering or shaking, as if the pixels are in a very tiny earthquake. i'm running at the native 1280x1024 resolution and i've noticed if i change the resolution to, say 1024x768, the jitter goes away. even if i switch back to the native 1280x1024, there will still be no jitter for a while. but, eventually, it always comes back.

any idea what the issue is?

 

[LittleNemoNES]

is the monitor 6 or 8 bit?
Is your VGA cable new, old? Maybe it's damaged.

 

[brikis98]

Originally posted by: gersson
is the monitor 6 or 8 bit?
Is your VGA cable new, old? Maybe it's damaged.

it's a new 8 bit monitor and the VGA cable came with the monitor and is also new.

 

[xtknight]

My guess is some type of interference (particularly thermal/humidity) or pressure on the panel. It could be the VGA cable too. Try adjusting phase/clock in the monitor's OSD while the effect is happening and see if you notice any difference. You have tried auto-adjusting the LCD for the VGA connection, right?

 

[brikis98]

Originally posted by: xtknight
My guess is some type of interference (particularly thermal/humidity) or pressure on the panel. It could be the VGA cable too. Try adjusting phase/clock in the monitor's OSD while the effect is happening and see if you notice any difference. You have tried auto-adjusting the LCD for the VGA connection, right?

i didn't recall any phase/clock adjustments, but i'll look again monday when i'm at work. and yes, i've used auto adjust.

 

[TSCrv]

does you monitor have any moire adjustments? or corner moire (cant remember actual name), id try fooling around with those, BUT i have only seen the corner one on professional series monitors.

 

[xtknight]

Phase/clock may be called H.Size/fine on NECs or perhaps Coarse/fine.