Question My computer won't turn on.

Feb 14, 2019
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I've just built my computer, but when I power-on, the fan spins and it looks normal, but nothing displays on the screen it says "No signal".
Then I turn it on it buzz once.
What can I do?

Parts:
  • Motherboard: Asus B360-F Gaming
  • CPU: Intel i5-9600K
  • CPU Cooler: NZXT Kraken M22
  • RAM: Tridentz DDR4-3200 8GBx2
  • PSU: Old Cooler Master 600W
  • GPU: MSI GTX 980 4GB
What I have tried:
  • Unplug the GPU and plug the DVI in the motherboard.
  • Tested the PSU.
  • Reseated the RAM, and almost all the cables.
  • Reseated the CMOS Battery.