20 Most Recent Hitachi 42HDT52 42 in. Plasma HDTV Questions & Answers

The issue here could be a capacitor within the power circuit. Also could be a power transistor that is faulty. On the easy part it could be a matter of reprogramming the unit but I doubt it.

These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. http://electronicshelponline.blogspot.com/ http://electro-medical.blogspot.com/ If blinks continue without any pause, the main board is faulty. Search the site by type in the "brand name" to your device, in the "Search box at the top right of the display window of the Homepage" to get gathered related posts.

If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

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How old is your TV?
Do you have any audio?
If you do not, more likely a power supply failure.

power button broke need replacement