I have just made a new PC and it is not displaying anything on the monitor. I have already tested the monitor and it works fine. The CPU fan and case fan spin, the motherboard's led lights up (same with gpu). Any ideas?
Let's get a complete list of specs. It's hard to have any ideas about a PC I know nothing about!
Generally speaking, the CPU being broken would be easily the least likely culprit and it would be a conclusion that one could only reach after a lot of troubleshooting elsewhere. But again, it's hard to say much when working blind.