Mitsubishi projector, Model EX51U is permanent mount and in frequent use with no issue. Current problem: Projected image is 3/4s of the computer monitor image. 1/4th of the image on the SMARTboard is missing on the left side of the screen. Not an over projection, no image appears on the outside of the screen. I have tried the factory reset, but the problem still persists. Any help greatly appreciated.