need help,there is nothing on my screen.

i have my mpc from 7 dayz,and all work good ,today i let my mpc on for
some minutes and when i'm back i see nothing on screen(not a letter).I turn
off some moments and when i turn on,it's the same,"nothing".Do the same
with the card,but nothing,somebody have this problem too?

Have you tried messing with the contrast.

Look in your manual about contrast cause I dont know how its done on the MPC2500.

Hmm, not heard this one. Try putting the OS .bin file onto the root of your cf card, turn the MPC off then turn it back on whilst holding the window button.

You could also try turning it off then turning it on whilst holding the erase key to do a factory reset.

Sounds like it's donald ducked to me.