Monitor still in warranty? If so RMA it for a replacement.
First read warranty terms click here AND click here
Next, contact their service people to confirm it's eligible warranty + fault-wise:
Tel: +44 (0) 871 855 24 25
If yes to above, complete RMA online at click here
Not absolutely sure if that's the correct procedure, but it's what I'd do if my 19" Hanns-G of 2 years went down. All the best with it :-), G