Red display screen ..!!

A few days not to open the computer.And then suddenly open the computer.Findings suggest a problem before ..opened and the display completely different.Very deep color and the entire screen is dark red.What to do in order to restore the same as before? What not-for-display or In other words, what kind of things ..know the trouble to tell the next.Thank you,

1.Magnetized by the consumer about ….Magnetic.And not to the high magnetic field near the items on display (such as speakers.)
2.'s CRT display screen shows have already gone out.If you just bought the non-brand-name appears on the display screen red, then you bite, One is about to be bought out of the display.