Model: Hitachi 57S700 (rear projection CRT)
It is randomly jumping to a flashing green and purple screen after working for a few minutes. It happens to all the inputs (HDMI, Component, standard analog video, antenna). Sometimes its flips to a pattern of green as well. While doing this, the on screen menu and magic focus work and display perfectly. Here's two videos that show two of the three ways it's been failing (in the second video, the purple is actually pretty dark and it's consistent across the screen, it's just the bad iphone video camera that makes it look like it's brighter in the center):
http://www.youtube.com/watch?v=a2wi5si5JEA
http://www.youtube.com/watch?v=m4dBwC2vBj4
The TV will occasionally work for the first 30 seconds to 20 minutes before flipping to this mode and I have seen it once correct itself for a few minutes. I figure something is loose or a solder joint has gone bad but I'm not sure where to start looking on this TV. I wouldn't even mind swapping a whole board if someone can point me to a part number that will for sure fix this. Thanks for any help!
In case anyone else stumbles on this post...
It was a bad solder joint on XY06 on the input board (on the back half of the board). You could faintly see the ring around the pin, and wiggling the pin you could see the solder lift off the board. A soldering iron, some solder, and 15 minutes and it's fixed.