Thanks for all your posts regarding the PT--AX200u; they have been very helpful. We have been fortunate with over 8000 hrs on our machine.
We started with a yellow blob in the top left quadrant about 6-8 months ago. We replaced the bulb (it was time anyway), which didn't fix anything. The higher temps from the new bulb just caused the yellow spot to grow until it took up 2/3 of the screen.
I ordered & replaced the In & Out blue polarizers. The old ones definitely showed burn-in and I thought I had solved the problem. While I was in there, I also inspected the red & green polarizers which looked fine.
After I reassembled the machine, I turned it on to test & much to my annoyance, the same shaped blob was still there. I didn't have a video source connected so all I saw was blue screen. I think the color has evened out, but there is a darker blue center with a ring of brighter blue around it, framed by normal blue.
In addition, I originally was experiencing a yellow jagged fringe on the right side of the picture. I thought the old blue polarizer must have been delaminating & the new one would fix it, but I can still see that outline as well.
Anyone have any suggestions as to what next?
Thanks for your help,