I have 2 Acer X1261P PRojectors and had a spare. One of my Projectors the DMD Chip was going bad so I decided to swap it out with my other working DMD Chip..
Well I took out the old one and replaced it with the working one and when I turned it back on I get a white screen with a band in the middle horizontaly..
I looked in the service manual it stated check almost every component well it all looked good to me as I just replaced the DMD Chip.. I am unsure but what could cause issues with replacing a DMD Chip..
I had replaced one before and that worked out ok this time not so lucky.. I may just be buying new Projectors :(