Hello to all, I have a problem with an LG 52LG70-UA. Have had it for 3 years and it has been flawless, there have been no changes to our entertainment system in about a year and everything has always been plugged into an APC 1500 theater edition UPS.
2 months ago if you turn the TV off and it would click and come back on again. Irritating, but not a big deal, unplugging it seemed to resolve it most of the time. Then, 1 month ago it started something new, when you turn the TV on, red light comes on, screen lights up, it displays "HDMI1..." like normal, then as it is about to display the picture, there is a click, it turns off, restarts itself, and repeats the same process over again. Sometimes it will do this for 20 min or so and then start working, sometimes it just does it indefinitely. We can still get it running by unplugging the power cord, waiting, plugging it back in, but it is getting worse.
What we have tried:
Switching HDMI ports (same result)
Disconnecting the receiver and attaching a single device (ie blu ray)
Tried using HDMI 1-3 (same result)
Leaving it unplugged for several minutes to hours (Seems to work, but it is intermittent)
Swapped HDMI cable (same result)
Swapped Power cable (same result)
Plugged directly into wall socket (same result)
I have read about capacitors malfunctioning (i'm a network engineer) and I disassembled the TV, removed the invertor boards and the power supply board and found that all of the capacitors look perfect (ie no bulging or leaking). I'm going to take the powersupply board into a local electronics store and have them replace the capacitors anyway. But, does anyone have any experience with this particular problem. I've seen several mentions on AVSF and other Googled info, but no real answer.
Any info would be greatly appreciated!!! Thank you!