LG Plasma TV question

[radiotvnut]

A friend brought by her daughter's dead LG Plasma TV. She said the company furnished her with a new set and told her to do whatever with the old one. She wants me to see if I can fix it. I would like to know is it ok to lay one of these on it's face (gently on a blanket) for servicing. I've heard that laying one face down will ruin them; but, I don't know for sure. It was brought to me laying face up in the back of a van.

She says it's dead; but, I have not checked it yet. The only reason I took it was because she gave me some old radios, etc. and I felt like I should at least look at it.