Try unplugging the red connector on the IC board (the board with the 2 stk chips) and try to turn it on, the picture will look pretty crappy but if it comes on it is probably the stkxxx-xxx chips replace with oem parts or you will be doing this again soon.
Sounds like you only have the stanby circuit function on the power supply. More information is needed to help further. Does it have a smell to it? Can you hear any relays tripping over? Can you hear high voltage build to the tubes?
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