Just bought a Philips 50" PDP (50PF9431D/37) from Costco yesterday and noticed that it has a few defective pixels. This was a surprise to me as I wasn't aware that this happens on plasma displays.
These is one pixel about halfway between dead center and the upper edge in which the green subpixel is actually firing red like its neighbor to the right. The subpixel doesn't appear to be stuck on - it's just the wrong color. The blue subpixel to the left of the funky green one also has a bit of green in it as well.
About 15 rows higher up and a few columns to the right there is an area where a red subpixel takes on a slightly different appearance depending on the viewing angle. This symptom is repeated about 8 rows higher up and about the same number of columns to the left of the main defect I noted above. These two issues appear to be caused by a minor defect in the cover glass itself (but there's nothing wrong on the surface of the glass). In fact I wouldn't have noticed these very minor issues at all if I hadn't seen the miscolored subpixels.
None of the Philips documentation in the box addresses pixel defects. I've found a few "Philips Pixel Defect Policy" PDF documents on the web (not on Philips' web site though), but these all seem to be oriented towards LCD displays. Anyone know what Philips' policy is regarding these types of defects in plasma displays?
I already know that there will be no problem returning this to where I bought it , but I'd rather not bother if there's a good chance that a replacement unit of the same model will have similar issues. Is this a somewhat common issue with PDPs, or with this manufacturer or model?
My understanding is that a stuck-on pixel in a PDP would eventually burn-in and become a stuck-off pixel (although I don't think I really have a stuck-on pixel in this unit); and that this problem would probably not cause any further issues later. Do I understand this correctly? Is this really worth being concerned with at all?
Thanks in advance for your answers.