LCD issue appearing out of the blue

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Troels · #1 Post by **Troels** » Sat Oct 27, 2007 2:10 pm

Hello
My flexview screen has developed a little blemish by itself. It is not a pressure mark, it looks like it is behind the pixels or something.

This has been bugging me a little, and i mainly want to know what it is and what is it caused by.

Has anyone seen this before?
What can be done?

I have done nothing to the screen, and always "babied" it. When it was completely new, there was no such blemish, now it's there after 5 months.

A picture: (Warning: ~3 MB) http://peecee.dk/?id=75098, fullsize: http://peecee.dk/index.php?id=75098&noresize=yes (macro shot with +17 magnification)
It's near the middle.
The stuff on the right side is just dust on the outside of the lcd which is easily removed.

#2 Post by **erik** » Sat Oct 27, 2007 2:45 pm

it's caused by dust inside the panel. i've personally seen two UXGA panels do this and have read about it quite a few times.

i'm not sure what to do besides replace the panel. maybe someone else has another solution.

is yours an ID Tech or BOE-Hydis?

Troels · #3 Post by **Troels** » Sat Oct 27, 2007 5:13 pm

Hi Erik,
I was fearing that it was some sort of leakage, which was about to spread, so i'm glad if it's just dust. But how it got there is beyond me. It does not seem to move, regardless of the fact it is lugged around daily.

It's an ID Tech.

Actually the old ID tech UXGA i bought as used for my T42 had some very similar spots in the same area, but there were more of them, but i thought it was something the previous owner did to it.

Seems as if these aren't air tight

#4 Post by **erik** » Sat Oct 27, 2007 6:36 pm

my R50p and T42p UXGA panels (both ID Tech as well) had this issue. i don't know if the BOE panels are any better about it.

Troels · #5 Post by **Troels** » Wed Oct 31, 2007 5:41 pm

Hmm, that's not good to hear. The BOE-Hydis could be better or worse, since the construction can't most likely be 100% identical.

Just for the hardcore freaks i found this:
http://www.laptoprepair101.com/laptop/2 ... cd-screen/

You seriously need to have som guts for doing this. I think it helps the successfullness if the screen already is bad.... So maybe i will try this out on my other UXGA flexview with pressure marks and a red halo in the right part of the screen... it also has some dust particles inside the LCD assy. The operation will be done in a clean room with next to no dust, if any... it's normally intended for inspection of multilayer PCBs

This dust must be between the LCD and the transparent film behind the LCD.

LCD issue appearing out of the blue

LCD issue appearing out of the blue

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