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The power up sequence is being interrupted and this could either be the main power supply or a protective shutdown of the supply because of a downstream failure.
The clicking you hear is the activation and dropout of a relay.
If the flashing seems to be in a pattern, it may be telling you what has failed via the coded flashing.
Any Sony service (or service tech) can tell you what the problem likely is if there is a pattern to it.
The Chassis will need to be sent to Mitsubishi to be refurbished. The Boards are not available and have not been for quite some time. Due to the cost of repairs, I recommend you to call Mitsubishi at 1800-332-2119 to see if they could help you with the cost of repairs and also to refer a Service Facility local to you to do the work. I would estimate the cost of about 300.00 to 400.00 if Mitsubishi helps with the repairs. If they don't. I estimate 700.00 to 800.00.
I hope this helps,
When the timer light stoped flashing the remote control would not turn on the TV. The next time the light quit flashing I held the power button in on the TV for about 5 seconds and it came on and has had no problems since then with the remote or the local TV power button.
Pull the three connectors to the yokes on the convergence board. If the set powers up, it's a good chance the STK392-110's need to be replaced. I fixed one today, and it has been running for 6 hours now.