Originally Posted by thethirdnut
Does the same thing on VGA...
I guess I will be contacting Epson to figure this out.
The ribbon cables are probably in place, but for some reason resetting them solves many of these problems. The same happens with LCD TV sets.
Here's an exploded view diagram:
This diagram can be a little bit overwhelming, but what you may need to look at is the second page: remove all the 'S0060' screws underneath the projector, and the 3 'S0080' screws on the back. The middle screw on the back, the one below the word "service", holds a little piece and I'm not sure you need to remove it. If you do, don't drop that part (check the diagram). You'll need a screwdriver, with an extension rod to reach the screws below. You may want a magnetic tip on it to pull the screws up. Make sure you hold it together when you flip the projector after removing the screws underneath.
Here's a video with some tips on how to remove the front part:
DO NOT remove the upper cover yet. I don't know this projector, but it seems the button menu is on the side, so there should be no cables attached to the cover. However, you should lift it up slowly and look underneath it just in case.
At second 56 of the video you have a clear view of the mainboard. The 3 black wide cables emerging from below near the lens belong to the LCDs. There's a white switch at the end of each one, which you have to flip up to release, and flip down to lock. This is all you have to do: for each of these 3 ribbon cables, flip the switch up, detach, re-insert and flip the switch down to lock. This should be smooth, no force is necessary.
Here's a video showing a ribbon cable switch in action:
You won't need to do anything else inside the projector, just close the projector and screw it back again.
Take it easy and don't force anything. If you feel something is stuck or stiff, confirm that you have removed all the screws, look around the projector and try to find out where it needs to be loosened up, then try to loosen it up a little bit, slowly. Double check for any screw I might have missed.
On the ribbon cables, use lab gloves preferably.
I hope this solves your problem, but please understand that I have no way of knowing for sure. The problem may be the mainboard itself, and I have no clue about possible firmware problems with this projector, but I suppose it wouldn't suddenly cause a problem like this if it's the same version you've ever had.