"No POST", "system won't boot", and "no video output" troubleshooting checklistThis checklist is a compilation of troubleshooting ideas from many forum members. It's very important to actually perform every step in the checklist if you want to effectively... Read More
Well that was embarrassingly simple. I hadn't plugged in the cpu power cable.
In my defence, I had looked at the cable and wondered where it had to be plugged in!