I have the same television LN52A650A1F. I too have the same problem with my tv. I tried the firmware update and still the television won't turn on. I found that the power board is what seems to be failing. The tv gets to hot and the capacitors swell and even explode. I am past my warranty so I took a look around in the back to see what was going on and was able to see that the capacitors were in fact pretty swollen. I am currently waiting for a new power board in the mail and will let you know what the out come is.
Hi all. I would like to create one centralized thread for those of us who's TVs have stopped working and are stuck in an On/off cycle.
Problem description (from what my LN52A650 was doing): The LED flashes on the TV, the relays click, the TV plays the melody and then repeats the cycle. No picture or sound.
For a video example see:
Suggested fixes so far: Firmware updates have been suggested, however, this issue is not firmware related as many of us, myself included, updated their firmware long before this problem arose.
My TV is in the shop right now. If/when it is fixed, I will post what was done and/or what part(s) were replaced.
If your TV stopped working and is exhibiting the same behavior, please chime in and let us know. The more responses we can get, the better. Thanks.