Our Panasonic Plasma TV Model TH-42PV500A is going standby mode or auto off itself, how to solve this.

SOURCE: panasonic th-42pa20 plasma 42 inch tv

Try to replace the Main Power Supply board first.

SOURCE: The green light on for 2 seconds and off again (Panasonic TH-42PWD5UY)!

PROFESSIONAL REPAIRER OF:
* cd-vcd-dvd-ld player.
* colour tv, Lcd/plasma tv.
* projection tv.
* prologic AMPS
* Grill/microwave oven's
* Digital proffesional camera.
* Digital camcorders.
* LCD/Digital projector.
* Hi-Fi music system.
* FAX machine.
* printer/scanner/copier.
* play station (PS1-PS2).
* X-BOX360.
DIAL..........: 9820380682

SOURCE: Panasonic Viera TH-42PV7HS Plasma keeps shutting down

hi there, have the same kind of problem twice so far after was bought for me as x-mas present (although my viera isnt plasma, its an LCD TX-32LMD70A)..

I Pulled out the mains plug for about 10-20 seconds and then plugged back in (power button at top was pushed in, in the on position, so when the power was on, the tv just goes straight on). It then worked.

i would however like to know why this happens ( i really hope this isnt a hardware problem, as like many others... its only months old!!)

hope this helps

SOURCE: Panasonic TH-50PZ Plasma TV won't come on.

I had the same issue twice with a TH 42PWD5. turns out it was my UPS that was killing the switching power supply. Warranty covered it but when I removed the UPS not a single issue in 3 years. 

SOURCE: Auto Switch does not work for HDMI inputs

Try this:
http://www.avforums.com/forums/6539544-post3094.html