HI guys I am new in this forum, and just registered on Tuesday. I am having this problem on my PC for less than 3 weeks now. The monitor says "RGB No Input Signal" this is the first time I encountered this problem, after using it for more than 2 year but less than 3 years. This happened when I tried to switch it on when I went home. It displayed the message "RGB No INput Signal" in RED on the monitor, after that it turned blank no picture just pitch black. This happen for 2 weeks but somtimes it turns on normaly but then after 2 weeks no longer start nomal. only the message in red colour and then blank. I tried to switch it on a lot of time but no use stil. All the cables were plug correctly and tightly but still. All the cpu fans working properly. I seriuosly need help as soon as possible pls.