I have a PN50A550S1FXZA and am having the same start up problem as many have, with the machine turning on and off many times with alternating screeching sounds and different colored screens. This just started and only does it sometimes, not that bad, but I assume it will get worse. I know from reading previous post that it is most likely the main board.
What model # is my main board? Do I need to open up my TV to find out if its A, B, E, D etc...?
Do I need to fix this sooner then later? will it damage anything if I wait until it gets unwatchable?
When its time to fix it, I know most places don't carry the main board anymore, so my two options to fix the board are:
1. Reflow the main board at 400F, for 8 minute, let cool.
2. Replace Main Board and there are two options for this:
1. Order one off eBay.
2. Buy repair parts from: shopjimmy dot com "Samsung BN94-01658B Main Board Component Repair Kit for PN50A550S1FXZA" (Is this option good? what would i need to do to replace the parts on the board? Ive never done any soldering, but i do have a soldering gun and could watch some YouTube to learn how..)
In your opinion what would you do?
Thanks everyone for all this knowledge and help on this forum! Im lucky mine lasted this long....