The wires green yellow red and white ripped out from my keyboard.the letters VGDC corresponds to these wires... but I don't know which letter indicates for which wire... somebody please help me to refix it

Your best bet is to contact the manufacturers tech support by e-mail service and ask them to send you a photo of your model boards wiring. If the wires broke from the board leaving no indication of which is which, guessing could ruin the board. Then there is the Sherlock Holmes method. If you can tell where wires came off by a little wire left soldered to the board or a hole in the solder, you might be able to determine by the length of the wire what goes where. Usually red is positive power and white negative. Therefore, if + and - are indicated on the board, and the green wire is a lot shorter than the yellow, that would be a good guess.

Unfortunately I cleaned all the remaining things... AM Totally TRAPPED :D