Television and Home Theater

I am looking for some help trying to fix a Mits 40in Monitor. I have tried to find a repair manual but have been unsucessful.  It turns on but no onscreen display or picture.  Its a Model MDT402S & Serial A000193.  Any help would be great

I am a new here,the first post I'd like to share a free  YouTube Mate with everyone.

detailed description

YouTube Mate helps you download, convert, play and manage your
favorite YouTube videos... and it's very easy to use. If you're a
YouTube fan, you'll love YouTube Mate!

YouTube Mate easily:

* downloads YouTube videos

* supports unlimited simultaneous downloads (a real time saver!)

* automatically names the downloaded video the same as the YouTube title