I have a Samsung LN52A750R1f TV. IT WAS TURNING ITSELF ON & THEN OFF REPEATEDLY. THE BACK LIGHT & RED LED WOULD GO ON AND OFF ON ITS OWN. WHEN I LOOKED AT THE CAP'S ON THE POWER BOARD BN44-00201A BOARD THEY ALL LOOK CLEAN & NOT SWOLEN. WHAT COULD BE THE PROBLEM.. MAIN POWER BOARD BN94-01708C??

SOURCE: Samsung TV won't turn on- trying to fix it. A challenging problem

I had the same problem. I live in NJ and called the local authorized "service provide" listed on the Samsung website. What a joke. Quoted $350 just to show up, never showed up. So I opened my own TV. Took off the plastic back (10 screws) took off the large metal RF shield (12-14 screws) and noticed a blown component. The markings on the component were KL15L and it is apparently an NTC Thermistor. Obviously it got fried and not knowing if there was other damage I decided to set out to replace the entire Power PCB Board Assembly and not the component. There were two part numbers on the assembled board (BN97-00457E & BN94-00622E). After searching online I also found a suitable replacement number for these (BN96-04896A). I found two places who claimed to have the part or have it on order (shopjimmy.com and vancebaldwin.com). After placing orders with both and having neither come through, I broadened my search and found out that the LNR409D was basically the same model as my LNR408D so I looked for its Power PCB Board Assembly part number which turned out to be BN41-00521B. Google search for that part number showed the item available on ebay. I bought it a week ago (ebay 260311519904) for $144 plus $12 shipping. I removed the bad board an hour ago (6 screws about 7 connectors) installed the new one, plugged in the connectors, replaced the covers, plugged in the TV... AND IT WORKS!
Suggestion: If your TV is out of warranty then open it up (what have you got to lose) and see if the problem is obvious and maybe something you can fix (replace) yourself. The parts, spare boards, etc. are out there if you look.

SOURCE: keeps turning itself off with a red light next to

have you changed the lamp in this set. If you look by the red light it probably says lamp

SOURCE: olevia 437-s11

Most likely the CCFL inverter has been the problem all along....

SOURCE: ln40a530 samsung lcd tv wont turn on

MAY BE PANEL LAMP BAD

SOURCE: Samsung LN40A530P1F LCD TV keeps blowing main

good day. your power supply is defective. maybe the regulator is shorted. you need a qualified technician to fix your problem.