I'm having problems with my computer/monitor/graphics card. I don't know which one, but sometimes when i start my pc up the computer starts, i can hear everything whirring away, but the monitor is a blank screen, with the light flashing. If i press a button on the monitor, it displays the message "Monitor in power saving mode". This only happens sometimes, very randomly. Usually it fixes with a restart, but this arvo when i restarted it just kept doing the same thing. I checked all the cables, opened up the computer to check everything's plugged in, it all seems fine. After about three hours of stressing, and trying to work out whats wrong with it, my sister comes home and turned the computer on, and alas, it worked! This is extremely annoying and i dont know when its going to happen next. Also, even though its working now, my display has a sickly bright yellow shade. It's very weird. Can anybody help me?