Question PC turns on but no display.

[Moiz51]

My pc turns on but gives no display (no signal detected)..
I managed to start a game file with keyboard shortcuts and can here the whole music and sounds..
It means my pc is booting but why it is not displaying?
I have also checked my monitor with an android tv box and it displays perfectly.

My PC specs:
1)CPU 9400f
2)RAM 8gb gskill
3)MOBO ibuypower Z-370 IB-R
4)GPU NVS 315
5)PSU Thermaltake 630w Smart SE
6)SSD 256gb (don't know brand)

Please need your help!!

 

[Lutfij]

PSU Thermaltake 630w Smart SE
How old is this unit?

You might want to try and source a reliably built, similar wattage PSU from your friend or neighbor and see if the system powers up. If it does, the issue is your current PSU.