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Try unpluging from the wall and theplug back in and try turning back on to reset. Sometimes holding the power button in while pluging back in will reset it, every brand is different for the hard reset.
It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.
Flyback is going out in this unit and would cost $120 for a new flyback if I were to repair it for you. So you have two choices have it repaired on recycle it! The repair these days on TUBE tv's are not very cheap because of having to find parts for them. Rulds2008
If the TV will not respond to either the remote control or the front panel controls and/or will not power Off, press the SYSTEM RESET button with a pointed item like the end point of a paperclip. The TV will turn Off and the TIMER light will flash quickly for about one minute. When the TIMER light stops flashing, you may again turn on the TV. The changes you made the last time the TV was on before you used the SYSTEM RESET button may be lost, however, the changes that were previously saved are not lost.
The set is in protective shutdown because a problem was detected. The 5 blink code indicates that the problem circuit. In this case it is the blanking circuit. Were there any indications of problems prior to the storm? If not, I'll need to lok up this one for the specifics. Do you intend to repair this yourself?
Let me know and I'll provide the details.
Looks like the flyback (high voltage transformer and probably the majority of the power board is kaput. It would be cheaper and probably worth your while to invest in a new TV rather than try to fix this one..
My Sony FD Trinitron TV did samething, started flashing, then eventually went completely black with volume. I got on internet searched found a solution, i tried it, it worked. unplug tv, remove all screws, remove back. towards bottom right theres a transmitter with a couple of knobs, we plugged tv in and moved knobs around and it worked. Also was extremally dusty, we used computer duster for a better connection. hope it helps you