Samsung PN50A550S1F does not turn on, relay clicks.
Well...I'm BACK !!!!!. 
After I installed the new power board last October (a YEAR ago !! See prior thread) and had a functioning TV again, I parked this TV in my bonus room and didn't use it.
I had already bought a new one, so this was a spare for future home expansion. 2 days ago I moved it into the remodeled master bedroom and turned it on for the first time since last year. Everything was great.....until last night when it made a couple of pop sounds and went blank. Turned it off and back on and life was good for about 15 minutes and then blank screen, relay clicking....just like the original problem!!!
OK, I've gone back into it......here's where I am at now. Unplug Main from PS and power does not come on at all. Unplug any other board and no change, clicking relay.
Installed 270 ohm resistors on Power to Logic connector PS-ON to Gnd and Vs-on to 5.3v. Jumped test pins 3 and 4 on Logic board.
With Main unplugged I get no power. With Main plugged in I get 55 volts on Va and 204 volts on Vs. The screen does test colors starting White then Green then Red, but then the relay will click off and back on and the cycle starts over again.
By the way, I also replaced the Y-Main with a new one I had purchased just in case my poor solder job on the replacement cap last time was at fault. No change.
So......what do you suggest? I don't think my new Power Supply is the culprit, unless it has been killed by some other fault. Is it the main ?
I read somewhere else about a cap at C102 on the underside of the Main being a common culprit?? I have ordered a couple (inexpensive), should be here Friday, so I can install this weekend and see.
Any other advice???
After I installed the new power board last October (a YEAR ago !! See prior thread) and had a functioning TV again, I parked this TV in my bonus room and didn't use it.
I had already bought a new one, so this was a spare for future home expansion. 2 days ago I moved it into the remodeled master bedroom and turned it on for the first time since last year. Everything was great.....until last night when it made a couple of pop sounds and went blank. Turned it off and back on and life was good for about 15 minutes and then blank screen, relay clicking....just like the original problem!!!
OK, I've gone back into it......here's where I am at now. Unplug Main from PS and power does not come on at all. Unplug any other board and no change, clicking relay.
Installed 270 ohm resistors on Power to Logic connector PS-ON to Gnd and Vs-on to 5.3v. Jumped test pins 3 and 4 on Logic board.
With Main unplugged I get no power. With Main plugged in I get 55 volts on Va and 204 volts on Vs. The screen does test colors starting White then Green then Red, but then the relay will click off and back on and the cycle starts over again.
By the way, I also replaced the Y-Main with a new one I had purchased just in case my poor solder job on the replacement cap last time was at fault. No change.
So......what do you suggest? I don't think my new Power Supply is the culprit, unless it has been killed by some other fault. Is it the main ?
I read somewhere else about a cap at C102 on the underside of the Main being a common culprit?? I have ordered a couple (inexpensive), should be here Friday, so I can install this weekend and see.
Any other advice???
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