Hi there. Hope someone can help. I have an iMac and a couple of nights ago it started displaying the number 1 button continuously (as if I was holding it down all the time) I thought it was the keyboard so disconnected but the problem continued - bizarre. Virus scan showed no problems but the after restating I got the White screen. Resetting the using command, alt, p & r seemed to resolve but within 30 mins it started again. Is anyone aware what is going on?? Would taking back to factory settings help ??? Thanks in advance - hope someone can help??