I have a 42" LG plasma tv. There is power going to the TV, with sound, but no picture. Any guesses why?

SOURCE: 42 inch LG Plasma TV - Lost picture

sounds like it may be a software upgrade

SOURCE: 42 inch LG Plasma TV - Lost picture

ysus pcb that supplies voltage to the panel is faulty

SOURCE: 42 inch LG Plasma TV - Lost picture

Our LG 50" plasma tv screen went black after a popping noise but still had sound, after great diliberations decided to take the back off and have a peek!
We unplugged the tv and tested the fuses (there were three we could see) one had blown, the one on the left as you look at the back of the tv it also has one above it. We wrote the code/seriel number down and took the fuse to the electrical wholesalers Maplin and bought a pack of 10 fuses for £1.29 replaced the fuse in the tv and everything now fine!!!!!!
Hope this might be of use to anyone whose lost the picture after a loud popping/snacking noise but still has sound.

SOURCE: hp 42 plasma tv cptoh 0602 I get sound but no picture

I had the same problem today, Hp wanted $629+tax to fix. With a little mechanical ablity anyone can fix this.
1. remove back covers
2. left-hand side is the video board
3. two white fuses
4. replace

this fixed mine and they only cost $1.50 each

SOURCE: 42 LG Plasma picture distorted and flickering

replace the control module.