I have forwarded this question before, and "cobweb" replied stating that 3 pin voltage regulator on small PCB probably dry jointed. I re-soldered this and for a while the TV was ok. Now it keeps going off again and remains on standby - sometimes difficult to turn on at all and clicks back to standby immediately. Small PCB looks ok, could be another dry joint on main PCB, but where - this is so frustrating, and similar prob to Paul Barrett's also this month.

Stevo Borko, March 2006

Hi.
Try resoldering all components on heatsinks & any 3 legged devices transistors & regulators on right half of main pcb front to back this is power supply & line stage.
Be carefull resevoir capacitor in power supply may be charged holding high voltage discharge this cap before attempting any work.

chris, April 2006