Am looking at one of my club members PC and after using his firewire connection the screen went blank and showed the "No Input Signal".
This PC has a separate graphics card and no onboard card so my first thought was the graphics card has fried! Tried 3 different monitors (all known to work) with 3 cables, no joy. I have just replaced the card with a brand new one and still no joy. I'm guessing it must be the motherboard. The PC is a Dell 5 years old. If it is the motherboard it hardly seems worth replacing. All data is backed up but I could always connect the hard drive to another machine if there is anything on it of importance that had been missed on the backup. Is my diagnosis likely to be correct or is there some other possibility?