u2410 blank screen

my u2410 panel has worked for 3 months hooked up to a vostro.

Now all I get is a blank screen on the panel.

I've disconnected it from the vostro. It powers up and goes through the blue buttons and settles with the blue power light on and a blank screen.

when connected to the vostro still a blank screen and only blue power lamp.

is it dead?

sammy