eliza wrote:UPDATE: After 3 weeks of smacking the TV it doesn't work anymore and there's no picture when we turn it on. We're thinking of replacing either the mother board or the circuit/power supply board? Which one should we replace? Anyone? :/
eliza,
Sounds like you are really having some woes with your TV. Now I can't promise anything but here is the phone # I called (the one with the very helpful service tech, read my posts on page 26) 321-953-5294. I spoke to John. Now this all started from a Samsung service request # for me so they already had some info on my situation. Again I can't promise you will get the same level of free advice I got but it is worth a shot to steer you in the right direction instead of piecemeal replacing part after part. If you get a chance to speak to them be very specific as to what your problem is and they may be able to help.
Good luck.