RCA F32649 sound but no picture

ok you must go to the Horzontal drive curcuit and remove a small coil called L401.. Scrap off the leads, reinstall and resolder. all your troubles will be gone. also for giggles resolder the horz drive transformer as well. also you may need to dom a tuner mod as toi resolder the sheilds around the tuner as well as the grounds inside under the bottom tuner cover. Good Luck

This usually a problem on/near the horizontal section of the TV board caused by solder that losses its contact thats why you need to bump it sometimes for the picture to come out. To remedy this just try to resolder any parts that you suspect seems to loose especially in the part where the components tends to get hot when operating, this usually are the horizontal section or the power supply section which is very common.

 no picture but have sound lg plasmer tv

could also be the solder on the crt board, the filament circuit.