I would like to know the procedure to reset this TV because what it does as the power cord is plugged in the relay click and the power light comes on and then the relay clicks on and off until theOPC light blinks

If you haven't power reset then;
Disconnect the Cabrio from power, unplug or flip breaker off.
Wait 5 minutes before restoring power.

If it still won't respond, then likely a control board/power and/or interconnect issue.

There should be some fault with its main power supply regulator board circuit. Contact any service technician.

Need to know how many times the led is blinking.

Try this link for more information

Re: tv kdl-55ex620 red light blink 8 times Do a Power Reset. 1. While the TV is off, unplug the power cord of the TV from the electrical outlet. 2. Let the TV remain without power for 60 seconds. 3. Plug the power cord back into the electrical outlet. (If the television is plugged into a power strip or surge protector, remove it from the power strip or surge protector and plug it directly into the wall outlet. If the issue is resolved, the problem is with the power strip or surge protector and not the television.) 4. Turn on the TV. 5. When the TV powers on and a picture is displayed, reset the TV to factory default settings.

• If the Reset message does not appear and the TV turns off and on, begin again from step 5.

• If the standby light begins blinking eight times, return to step 1.

6. After the Reset message appears, allow the TV to reset. Do not press any buttons on the remote control or on the TV and do not make any other adjustments for 1 minute. 7. Unplug the power cord from the electrical outlet. 8. Allow the TV to remain without power for 10 seconds. 9. Plug the power cord back into the electrical outlet. 10. Turn on the TV.

• The initial setup screen displays if the above procedures were performed correctly.

11. Follow the on-screen instructions to complete the initial set up. 12. Perform a system software (firmware) update.

If there was a power outage the problem is likely in the power supply.

The power light on the front comes on or not?

If no power light unplug the set and follow power cord inside and check the fuses---the click is a power relay activating---set may have up to 3 black relays on the power board.

Let me know your skill level and I will be happy to help.

SD TECH

This tv problems are related to powering up the tv and sustancening the tv power source to the tv itself.Replaced the tv sub power supply board where the a/c power cord plug into it.Try website like Ebay.com to buy a whole new refurbish sub power supply board for the replacement.

Please follow the below troubleshooting steps: 1. If the Television is plugged into a surge protector, remove it from the surge protector and plug it directly into the wall outlet. 2. Try connecting the TV to a different AC wall outlet. 3. Try power resetting the TV. To Reset the TV, disconnect the power cord for a short period of time (approximately 1 minute), then reconnect the power cord and power ON the TV. 4. If the issue still persists, TV will require service.

This is just a shot - but it worked with my Sony (same problem).
Pressed remote power on button AND held Power button on TV on at the same time.

Set clicked 4 or 5 times and then came on....

Other, most have a (VERY small) reset switch on the rear - near where the power cord enters the TV... Use a flashlight and a mirror to locate it on your set....

here is the schematics http://www.scribd.com/doc/33598674/Philips-42mf231d-Chassis-Tpe1-0u-Pa

Is the set completly dead...does the green light flash then go off. or when you plug it up does it come on for a moment?