Unusual LCD failure TDS3054

[Jwalling]

I don't think I've ever seen an LCD that fails with a vertical or horizontal line that didn't extend completely from side to side (or top to bottom)

Something new everyday...

[nctnico]

This could be a problem in the internal circuitry of the oscilloscope and not the display because it seems to occur in the signal trace overlay area. I'd try a different LCD first!

[Jwalling]

This could be a problem in the internal circuitry of the oscilloscope and not the display because it seems to occur in the signal trace overlay area. I'd try a different LCD first!

Oh, I did! The replacement is fine.

[nctnico]

This could be a problem in the internal circuitry of the oscilloscope and not the display because it seems to occur in the signal trace overlay area. I'd try a different LCD first!

Oh, I did! The replacement is fine.

Well then it certainly is an odd failure! Perhaps one of the traces on the glass itself got interrupted. I have seen localised defects in LCD screen though.

[Jwalling]

Well then it certainly is an odd failure! Perhaps one of the traces on the glass itself got interrupted. I have seen localised defects in LCD screen though.

That would make perfect sense if the driver chip was on the bottom! Good call. I'd dissect it if I weren't going to use it as a test display...
I wonder how it could happen though; there's a protective anti-glare glass that covers the LCD. 

[voltsandjolts]

Where did you get the replacement LCD, from Tek?

[Jwalling]

Where did you get the replacement LCD, from Tek?

If I had, my wallet would probably be $500 lighter, assuming that they're not obsolete.
I bought a couple of spares off eBay a year or two ago.

[voltsandjolts]

Hah, nice, wise move!