HAVE A MITSUBISHI WD-52528 IT IS DIM AND IT HAS PURPLE SPOTS IN THE SCREEN. ALSO I CAN GET INTO THE VIDEO/AUDIO SCREEN IT LOCKS UP AND TURNS OFF. CAN SOMEONE HELP ME WITH THIS PROBLEM?

SOURCE: Purple and Blue Spots on Screen on Mitsubishi WD52527 52 Inch HDTV

It could be only dust building up and it needs a good cleaning or it could be the DMD board is going bad and needs to be replaced.

SOURCE: Screen Removal - Mitsubishi WD-62527

SPEAKER GRILLE Removal
Pull the SPEAKER-GRILLE away from the cabinet to remove.
SCREEN-ASSY Removal
1) Remove 10 screws (a) from the upper cabinet rear cover (3 screws on each side and 4 screws across the
top).
2) Remove screws (b) along the bottom of the SCREEN-ASSY (8 screws on 52 inch models, and 12 screws
on 62 inch models),
3) Unplug the LL connector to the front CONTROL-PANEL.
4) Lift the SCREEN-ASSY up slightly and then pull away from the cabinet.
CABINET FRONT DISASSEMBLY

SOURCE: My WD-52528 has a yellow ghost/shaddow on the

bad light engine.

SOURCE: Screen is dim. Have brightness turned up to max

Yes... from the moment the lamp is put into service, it begins to deminish in brightness. You should order a replacement lamp to have on hand.

SOURCE: I have a Mitsubishi DLP WD-57734 and white spots

The projection engine have problems,it the cause.Two years tv shouldn't have this problems already.Call talk to mitsubishi,might get some help the cost of the repair.