Have same problem. Ordered and received new G and B polarizing filters for LCD block and installed myself. Had to order the G filter since when I was removing to inspect it cracked...so be careful, very delicate. When I removed blue polarizing filter, it seemed to have a 16:9 shaped 'burned in' shape, so I figured that had to be the problem. Replaced same. Unfortunately, after about two hundred $$ for the two polarizing filters (ordered through Panny) from part numbers in service manual downloaded from smpcshop.com for around $10 (highly recommend if you are going to attempt this yourself to save the $150 professional service diagnosis charge), I still have the same problem. So not so sure if it's those polarizers, or if it's the B incedence polarizer that is closer to the hot bulb. Solutions welcome.
SOURCE: Blue Haze on the left and various other places on screen
it's the polarizing filter on one of the lcds. they tend to fry due to excessive heat. clean the dust out of the projector so it can cool down properly. but you will need to replace that filter. it is fairly easy, but remember which plugs go where. however, many companies won't sell parts for or replace components of the optical engine or the prism assembly. if they don't, it's going to cost a bit. check the panasonic website for the closest authorized service center.
SOURCE: POLARIZING FILTER
you can't. either replace the entire optical engine or find another broken projector on ebay.
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