I am not a Tv repair man but this is how I fixed a 60" LG Plasma Tv Model # 60PZ550. The tv didnt show a picture on the screen or didnt have any sound but later after fixing it I found the internal speaker was turned off in the settings. I ended up changing most of the Transistors/Mosfets and the fuse. I did manage to change 1 IC chip but dont think I needed to. I will also say that a few days after the repair that I probly didnt do a very good job at soldering the IC chip and the tv started showing a bunch of lines on the screen and then went blank. So I rechecked my work and replaced the IC chip once more and also 1 mosfet that must have burned out from the IC chip that wasnt soldered great and then the Tv continued to work.
Affiliate links to some of the parts and tools I used to fix the Tv.
