TV / Screen Display off

I have a Mitsubishi Charriot Grandis Super Exceed.
Yesterday, suddenly the TV/Screen display stopped working. it is just black.
The CD , Tape, Radio are playing but I can see whats going on or do station selection. Where can I start checking to see what could be wrong

I don't have a manual and there are no genuine dealers around here.

Please does anyone have any ideas or clues

If you make a sudden drop to a speed breaker this type of problem may happen, try to remove the connection wire and replace it and check it.