6 year old 65" Plasma TV stopped working. Watching it the other night and the picture went black. Still had sound.
In an attempt to salvage my $2800 television, I researched repair options vs sending it to a repair shop ...or replacing (I know, the new tv's are cheaper now ... but I like this one and it would pain me to send it to the dump).
Took it apart to look for an obvious issue. Bulging capacitors, burnt area on a circuit board ... found nothing.
Bought a multi-meter to test for voltage. Seems to have voltage everywhere ... so without knowing what the "proper" voltage is supposed to be at these various boards, no telling which of the 13 boards is bad.
Aparantly parts are now obsolete for this antiquated 6 year old Samsung Smart 3D TV

.... so I purchased 4 "used" boards to replace the ones that I've learned are typically the cause of the "no picture" symptom. Changed the BIG one, hit the power and shes ALIVE!
Before putting it back together I left the back off and after 3 hours it was still working. Put it back together, hung it on the wall.
Next day, about an hour into watching ... bang, picture out again. Ugh, so now I'll replace the other 3 boards that I purchased. Good times.