Greetings...I have a Sansung Monitor SynchMaster 932 Nplus used to generate a parazite sound like CızZzz yesterday went dark. When plugged in the on/off button lights up as usual blue gets the power obviously Yet the screen flashes open for a s plit second..then does again the cıZZzz soudn again. .then goes off I used to attach the external monitor to my Hp lap top... thanks