HP Pavilion dv9700 Problem with screen

screen image turns psychedelic....lots of irradecent colors....I have to move the panel back and forth in order to get the proper background and then, be very light touching the laptop in order to keep it in the proper background color.

What could be the problem?...The trasformer between the laptop and the screen?.....help! Please, any help will be appreciated.

Thank you in advance,

D