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"shadow" on my new lcd monitor

Forum Computer Peripherals : Flat Panels/ LCDs - "shadow" on my new lcd monitor

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whizzywhig   05-01-2007 at 09:52:15 AM

hi,

lg 204wt-sf

http://img78.imageshack.us/img78/2745/dsc00312slicexk5.th.jpg

this happens only on the left side, visible only on medium-intensity colors (almost unnoticeable on white and black, and even on the standard windows widgets "light gray" ). it goes continously from the top to the bottom.

*maybe* on the right side the foremost pixels are a little too bright, maybe.

what could it be?
lamp? crystal matrix?


do you suggest to exchange it with another 204wt-sf?
this one has no dead or hot pixels, i'm a bit concerned about swapping it... the vendors of course do not allow me to test them before buying

thank you :)

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MonitorMan   05-02-2007 at 07:03:19 AM
- 0 +

Mura problem typically seen with TN panels. In this particular case it would be called V-mura.
This type of mura is usually seen at top 1-inch of screen across top.
Known issue with LPL panels seen with 19+ sizes.
Panel supplier process control issue.
A lot of the time V-mura (banding) will show up in the center of the screen. Monitor suppliers are supposed to screen for this but sometimes it's overlooked. Everyone is in a rush these days.
No guarantee it will get any better with new monitor/panel.
Insist on checking it first. Use full gray(med dark) pattern.
Good Luck.

Reply to MonitorMan
Bronze Peripherals badge jaguarskx   05-02-2007 at 07:45:43 AM
- 0 +

You can try to exchange it, but the next monitor may develop the same symptom.

Reply to jaguarskx
whizzywhig   05-02-2007 at 07:19:03 PM
- 0 +

thank you guys for the very informative replies

so if i understand correctly it's a panel problem....

the med-gey uniform pattern reveals the shadow quite well, but it's not dramatic.

using a pattern made of stripes
http://img211.imageshack.us/img211/6330/dsc00313bandelc6.th.jpg

the shadow is definitely there, but i think i can live with it, especially if there are worse alternatives...

Reply to whizzywhig
whizzywhig   05-04-2007 at 09:27:25 PM
- 0 +

i doubt it, but, just for sake of curiosity....

is it known if my type of mura can be at least partially healed with some form of software pixel/column/row massage? (ala pixelfixer or similar)?

thanks again

Reply to whizzywhig
MonitorMan   05-05-2007 at 06:30:33 AM
- 0 +

Sorry, not correctable.

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balaindin   05-01-2008 at 01:39:28 PM
- 0 +

Hi,
I am getting the same issue with my lap top.
2 inch of dull / shade color on the left side of Think Pad.
Did you correct / replace your LCD screen?
Is it ok to replace the LCD or the cable which connects the LCD to the CPU?

Thaks
Bala

Reply to balaindin
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