Chosen Solution
I have a Samsung LN46D550K1FXZA with Power Supply BN44-00441A… It died on me suddenly, now I have no power, display, et al. I took off the back, and I have a single capacitor that gave up the ghost. there’s slight surface scorching on the board but no other damage and the underside of the board is clean. The location is CP 820 but i’m unable to read what value was in there, and i’d like to not guess at it. Seeing as it’s a single $.10 part, i’d like to avoid having to order a service manual and hope it has a parts list and wait 3 weeks for it. Spending the dough on a new board is a last resort and months away from the spare change. !&&*, could probably buy a new, bigger tv at this point. If anyone could take a peek for me, or is handy with a manual already that can help me out, that’d be great. I don’t wanna scrap her, but I don’t wanna get into a money pit situation, either.
OK, so it’s not an electrolytic capacitor but either a varistor or a suppressor capacitor. And it looks like it’s on the mains input side of the power supply. (There’s a thick white line which should go from one edge of the board to another with HOT written on the mains input side. It should be straddled only by a transformer and a couple of other components.) It’s quite likely it will have taken a fuse out with it. I had a quick look for a service manual but didn’t find one, but my guess is that the problem is very close to the mains input, and the circuitry around there will be pretty simple. If you could take a photo, best focus you can manage and good resolution, looking straight down on the HOT section of the board, and another similarly of the other side of the board it may be fairly simple to trace through and work out what that component was doing. And while you’re at it, test each of the diodes with a testmeter on the diode setting. One of them looks like it was in the line of fire!
