I have a lg 42px5d hd plasma screen has just gone black but we have complete sound? is this able to be fixed.

Thanks for contacting Fixya Support, I am glad to assist.

What is more than likely the issue is that your HD Plasma TV may have a burnt-out Inverter or bad Inverter cable, as these are two components are key to the back lighting necessary for illuminating your plasma screen.

In cases like this, it would be advisable for you to contact the manufacturer (LG) first, to see if there are any known issues they are having with your model of plasma TV, or if there have been any whole unit or part recalls for this model.

The next step I would recommend after contacting the manufacturer would be to take your Plasma TV to a local TV repair shop for a least a diagnosis to see what the cause of the screen black out may be.

This does appear to be a hardware issue, but check with the professionals on this problem, is my recommendation.

I hope this helps.

Regards, Mactechtrainer