First off, I have a LN46A630. I did a search for an official forum for that model, but couldn't find one. I think the 650 might be similar enough so I thought I'd give my question a go here. If you do know of the right forum, feel free to point me in that direction.
For the past couple weeks we have had issues with this tv when we initially power it on. The screen will flash, sometimes make a screeching noise, power off and then power on again. This process happens usually two or three times. Once it is done the tv works fine, picture and sound are good, until the next power up.
Did some research and I thought it might be the transistor issues that Samsung had to make a settlement for. I called them to schedule my free fix and they sent out a tech yesterday. The tech said it seemed like a main board problem, not the capacitors, but changed out the capacitors anyway. Sure enough, the problem returned. The tech said changing out a main board is fairly easy and I could probably do it myself. However, I was doing more research and came across a similar post on a CNET forum. That commentor was having the same issue and replacing the main board 3 times didn't fix it. Somebody else was able to fix it by replacing the Side AV Input Board P/N BN41-00824C.
I have never replaced ANYTHING in a TV before and I'm nervous about where to start. I don't want to spend the money for a new main board if that isn't the problem. And if the problem IS the Side AV Input Board, then I have no idea how to replace that either.
Thanks for the help.