Mitsubishi SL6SU projector yellow blob
I have two Mitsubishi SL6SU projectors which are showing yellow discolouration on the screen. It is like a yellow circle blob on the centre of the screen, and does not cover the whole screen so it is not the cables.
I have tried cleaning one and fitted a new bulb, but this made no difference. I have been looking for more info, but could only find two on EBay which sound like they have the same problem.
I also have other projectors of the same type and age which are perfectly fine. Does anyone know what has caused this or if it is possible to repair this/fix this problem, or is it time to replace these projectors?