I turned on my Epson 8350 today and have these blue and purple "boxes" appearing over the image. I see them no matter if I put on cable or blu ray. I've gone through all the menu items and can't seem to find anything to fix it. I'm using the original bulb which has 380 hours on it. Never had any issues until I turned it on today. Scouring the internet hasn't resulted in finding a solution so hoping maybe someone here has ideas of what the cause/fix is. thanks!
You might try a different cable to see if that is the issue? If it's not, send the images to support at Epson, have them look and if they send you a replacement, ask that it be inspected prior to shipping.