LG 50PC55 TURNS ON WITH SOUND AND BLACK SCREEN

first check color level setting on the tv when on av source input. double check input you are using, yellow video input (not green)
then try another device in that same input, then try the DVD player on another tv. The problem will be either DVD player or incompatibility or bad main board in TV, but usually a DVD or compatibility problem(cheap DVD player)

I have the same problem. Good picture with no sound at all. I have a LG DVX583KH and LG TV LM7200. I connected the DVD player to TV via HDMI cable, I have a clear picture but no sound. I try to hook up the DVD to other TV and it works both sound and picture. Please help

check your input cable

Could have still been hit by a surge. Take the back off of the TV and look at the main board were you connect your HDMI. See if it is scorched or components that blackened. Also check your DVD player on another set. Your DVD player could be the problem.

If the DVD is connected to the TV properly using the yellow, white & red AV cable and the TV is switched to AV and there is still no picture, plug the yellow lead from the back of the DVD player into the green socket. If you see a black and white picture now the DVD output is on Progressive Scan mode. See user manual to turn off Progressive Scan mode.

Check first your dvd player settings if it is in PAL or NTSC.

my dreamcast console has sound but no video, it will go to the time setting scream but no responding after that point

first ,replace the tv-dvd cable,then ask me again.

Use a scart lead to connect it to the TV, that should cure it.

check this out http://www.techlore.com/forum/thread/12629/