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-   -   Tektronix LCD screen Bad (http://www.diyaudio.com/forums/equipment-tools/179721-tektronix-lcd-screen-bad.html)

wabun 24th December 2010 03:00 AM

Tektronix LCD screen Bad
 
I have a TDS220 scope which has bad LCD screen, any idea how the bad LCD screen happen ? Is LCD screen will turn bad after some years ?

http://i67.servimg.com/u/f67/14/17/71/23/rimg0013.jpg

Stocker 24th December 2010 03:22 AM

Did this happen to spend a number of years exposed to the sun?

wabun 27th December 2010 11:49 PM

Nope.never expose to sun.. :-(

Structo 28th December 2010 02:34 PM

Wow that is strange!
Never seen a screen like that, ever!

wizardofoz 2nd May 2013 11:26 AM

http://www.walaneh.com/xpl/xpl206.jpg

Mine is much the same as yours...did you try peeling the plastic off? Anyone know if this would kill the panel or if its a sealed part and peeling off will render the lcd useless?

PedroDaGr8 6th May 2013 03:18 AM

That looks to me like one of two things.
1) The layers within the LCD have become delaminated which results in the liquid crystal leaking everywhere. This is commonly called the black dot or more often black hole (or sometimes black hole of death because it is signs of an impending irreversible failure of the panel). It often starts as a black dot (or more than one) which grows and grows. It's not common but not unheard of, especially in older LCD panels.
2)The screen was cracked. Whether its due to aging (if they used plastics) or mechanical stress (impact, torsion, etc) I can't say. I can say in the second image it looks cracked.


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