Projector - Vivitek D855ST DMD Chip Board Replacement

First grab a 00 Phillips screwdriver remove the lamp cover.

Then loosen the 3 captive screws holding the lamp in the projector with a standard Phillips screwdriver.

Remove the following 8 screws securing the bottom housing.

Remove 3 screws securing the top housing.

Use the flat end of a spudger to pry the top housing around the sides.

Slightly lift from the front and push it toward the rear of projector to free the mounting tabs.

Remove the following 8 screws of various sizes on the top shield.

Remove the screw in red very last. It's tight and after removing the others, you can swivel the shield enough to loosen that screw without stripping it.

Remove one screw and the carefully disconnect 2 ribbon cables and 8 cable connectors from the main board.

Remove the 6 video cable standoffs from the rear of the projector. Needle-nose pliers will loosen them enough then a Torx-8 driver fits perfect to loosen them the rest of the way

Carefully push the rear of the video ports inward to push the board enough forward and lift up.

Lift up and disconnect the cable connector on the bottom of the board to the power supply.

Remove 2 screws on the right and left sides toward the bottom securing the power supply to the chassis.

Disconnect the cable connectors from the left and right sides under the power supply

Remove the following 3 identical screws to remove the lens unit.

Remove one screw and the tension bar holding the heatsink to the DMD Board

Pull back the shielding tape from the heatsink to the lens unit.

Remove 4 screws securing the DMD board to the lens unit

Pull it gently apart. It is held by thermal paste.