Is the unit working otherwise. i.e. Sound coming out?

Possibly display board fuses but unless the unit was dismantled that's pretty unlikely.

Need a bit more info as to what's exactly wrong.

No display could simply be no power...

Reminds me of a faulty meter we received back in service that said "LCD Not Working". When they said not working, what they meant was that somebody had taken to it with a sledge hammer for some reason.

The guys at the Eutronix link at the top of the page do repairs.