No power, clicks and turns off immediately

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://electro-medical.blogspot.com/
http://electronicshelponline.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.

I had the same very exact problem and got my hands on the service manual for the Rinnai 1001 series heater to solve it. As fas as the spark gap it should be 3mm but I went through a lot of tests of the components and found that Solenoid 1 coil was open. It should read about 1.3K and mine was completely open. Solenoid 1 is the one against the back cover. You'll need a small inspection mirror to see it but it is part number C23B-23. REMOVE POWER/UNPLUG FROM THE WALL FIRST then pull the plugs off all of them and check the resistance of the coils, they all should be about 1.2-1.3K. If you havent already found the answer I hope this helps.
Also check the pressure switch, bottom right side in the front. Its a disk, diaphram type device about 4 inches in diameter with a microswitch on it. That switch should close, zero to 1 volts across it, once the combustion fan starts up and builds a little pressure. If it doesnt it could be the switch or the intake or exhaust parts of the flue or filters are clogged.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/john_32f4b76dad4781c4

1. Turn off the printer ( "Power" button).

2. Hold the button "Resume", include printer (click "Power").

3. Hold the "Power" button, release the button "Resume" (power indicator / preparedness must turns green)

4. Not releasing the "Power" button, double click "Resume" and release both buttons
-- each time you click "Resume" power indicator / willingness to change color (one-click - yellow, the second hitting - green). U printers with more than one indicator - indication switches (power indicator / preparedness - green indicator error - yellow)
-- after the buttons are released, power indicator / preparedness will be for some time to blink green (Stamford time depends on the printer model), and then the green light permanently
-- If after these actions instead of constantly burning green printer continues to display error, or you are mistaken in paragraphs 1-4 (turn off the printer and repeat with paragraph 1), or if additional printer error that must be corrected, or it will not go down to a service mode.

5. Four times click "Resume" (each time you click "Resume" power indicator / willingness to change color, and the printers with more than one indicator - indication switches: the willingness / error).

6. Once you click "Power" to confirm the selected action (reset counter absorber). To disable the printer "Power" button to click again.
For some printers (for example, iP2000) to switch off clicking "Power" again, that is three in a row.

Try connecting the TV directly to a different wall outlet and check. If the issue persists, try power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue persists, then the TV requires service.

how many times is the power light blinking as thats a error code. 3 blinks is the most famous which means convergence circuit failure.

how many times does it blink and need make and model of tv set.

Just fixed this problem tonight. Had the 5 blink/flash thing. Opened it up and saw that the motor wasn't spinning so it wasn't a bad rpm sensor. Jumped the red to black and then the blue to black to verify motor worked. At that point assumed it was the logic board not telling the motor to start, but I could hear the click of the relay. Pulled the logic board out and noticed a solder joint that had failed directly behind one of the relays. Resoldered that joint and the garage door opener worked again like a dream. Hope that helps someone else.

i have fixed 3 of this tv, with that exact problem in the last 2 weeks, needs a power supply, you can try to unplug it again, plug it in, hit the power button, as soon as it turns green, unplug it again, after 15 seconds , plug it back in, if power doesnt turn on by itself, turn it on, if it turns red again, emediatily hit power again, may have to hit power a few times in a row, but most of the time you can get it to come on this way, once it is on, it should run ok, until you turn it back off, but not a fix, needs power board

it sounds like you could have a signal board problem they are pretty expensive but there is a web site that sells refurbed parts

HELLO. the fist this is turn on the set and just let it do it's own thing.!!! for around 7mins to 15 min's and see what happen's and then tell me ok. let me know ok