I picked up a TDS3012B oscilloscope with a bad polarizer on the LCD. It looked like it was melted or something but there was no other damage to the 'scope. I have no idea how it got that way.
From what I can see see, the display is working but without the polarizer there isn't much you can see.
The display is an NEC6448C20-08. Polarizer film comes in 0, 45, 90, and 135 degrees. How can I determine the correct polarizer to use?