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Old 24th December 2010, 03:00 AM   #1
wabun is offline wabun  United States
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Default 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 ?

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Old 24th December 2010, 03:22 AM   #2
Stocker is offline Stocker  United States
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Did this happen to spend a number of years exposed to the sun?
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Old 27th December 2010, 11:49 PM   #3
wabun is offline wabun  United States
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Nope.never expose to sun.. :-(
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Old 28th December 2010, 02:34 PM   #4
Structo is offline Structo  United States
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Wow that is strange!
Never seen a screen like that, ever!
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Old 2nd May 2013, 11:26 AM   #5
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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?
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Old 6th May 2013, 03:18 AM   #6
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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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