Right heres my problem lads. The dust is visable as a basketball sized area with a pink hue on light coloured scenes. Holding a white page a few inches from the lense resolves the patch into a conglomeration of pink points and also reveals lots of isolated yellow spots as well as pink all over the image (though these aren't visible in normal use) Using the test screens: Hardly any spots on the red screen, lots on the blue and lots on the green. Pink and yellow as mentioned earlier on the grey screen. So anyway, I got a can of compressed air the other day and put it to work today. I took the lid of and sprayed it into the slots beside the ribbon cables. I put the PJ back together and when I switched on the dust was still there. Disappointed I took the PJ back down and opened it up again. Before I did anything I sat down and had a good brainstorming session. First thing I did was head upstairs to get my bedside lamp and then dug out the dust wipes from the back of the cupboard and cut a few strips. I put the lamp directly over the ribbon cable slots and had a look in the lense. Got a lovely magnified view and could see serious dust contamination in one corner. After some further brainstorming to confirm that this was the dust contamination that appears on screen (ie dust on bottom left corner looking through lense becomes top right corner when PJ is upside down, which goes through lense to bottom right corner of screen (moon upside down/back to front through telescope etc etc)). I then got a strip of dust wipe and inserted it either side of all three polorizer plates. Not a speck was removed. I then re-inserted strip front and back of polorizer while looking through the lense. In each case the strip still appeared to be behind the dust plane. I moved the lamp out of the way, sprayed some more air front and back of each plate and then moved the lamp back into position and had another look. Still not a speck moved. After that I detached the panel ribbon cables from their mainboard connectors which gave me access to the top edge of the actual panels themselves. There didn't look like there was any gap but I gave the area a spray anyway. You guessed it, every speck still firmly in place. To cut a very long story short, would I be correct in assuming that the dust is on a surface be it prism, mirror etc somewhere between the panel assembly and the lense?? I've read a thread over at avs where a guy called cygerama (sp?) took his mainboard and the lid of the optical block off to change his blue polorizer. It looks straight forward enough and the job holds no fear for me although there are an awful lot of ribbon cables and power connectors to disconnect! I suppose you are wondering why I would even consider doing the job myself when my AE300 still has 6 months to go on its warranty? Well a: Is dust contamination of the optics covered by the warranty....and b: No Panny service centres in Ireland and if my experience with Panasonic with repair/return/refund of my AE100 is anything to go by, I could be PJ'less for anything up to 3 months, all for some dust which brings me to the point as to whether the dust problem is worth risking a DIY job or a 3 month wait for a Panny Service. I mean I'm on the verge of having a go myself and if you lot have done similar (ie taken mainboards and optical blocks apart rather then just spray by the ribbon cables)without problems I think I'll give it a go. So waddaya reckon lads??