While using my computer last night, the screen just went off and the no signal message came up, also the HDD light was constantly on even though the computer was not accesing it. I tried a reset but the reset button wont work, so i turned the computer off for a few minutes and then back on, still the same. Also the computer doesn't beep on startup or even go to the bios, i checked all connections, all ok. I think something must have failed, i built this system myself a couple of years a go (one of many) so i just need help identifying the failed part. Any ideas?

I had a similar thing happen recently and it was the motherboard that caused it. This was with the power supply and cpu fan running but no BIOS would appear, just a black screen. effdee

Dead video card perhaps? A few of my monitors will give that message if they are not connected to a machine. Jimi_l

Yea i think it is the motherboard, i was thinking about either a Abit IT7 Max2 or Gigabyte GA-8PE 667, would this be a good replacement for my shuttle AV40?

It can also be a failure in the power supply. A friend had it once and it was a broken wire (as he never opened the case I have no idea what caused it!). He also had no video anymore. But I'm not sure ybout the hdd light staying on. It can also be a bad hdd. Unplug the ide cable of the hdd from the board and see if the computer posts !!!