I have a Panasonic Plasma 42 in that has no audio or video. It is dated Nov 2008, Model#TH42PX80U. When A/C is connected the relays click and red led on lower right corner of “A” board goes on. After a few seconds relay again clicks and red led goes out. When front on button is depressed relays click and green leds on SS and SC boards go on, front screen slightly lightens and front red led goes on. Front red led does not blink. Afterwords, the relays will click with no change--no sound no picture & click every 10 minutes until I unplug TV. I downloaded the service manual from your site at http://www.toms-service-manuals.com/index.php. The voltages all appear good/within +.3 to +.4v except as follows. Page 12 Power Supply Standby P12 pins 8&10, SS12 pins 8&10 and SS34 pins1&3 having 13.34v not 12v. Page 15 Power On Operation all voltages appear good. Page 17 Voltages Distribution A51 pin 2 is 4.1v not 5v. Any ideas?