Hi @neclamchow,

First thing to check if a device doesn’t turn on is to check the power board and see if there is power on the various power outputs of the power board.

Initially just look for any obviously damaged components e.g. burnt out fuses, heat stressed or bulging components etc. on the power board.

If nothing is obvious, then testing with a DMM (digital multimeter) is required. At first with no power connected to the device and then possibly after that with power connected to the device if nothing is found first.

Here’s the service manual for the projector. This is a great help as it has the circuit diagrams for all the boards.

if you’re not quite sure post some close up images of the power board back here.

Here’s how to do this Adding images to an existing question