Question After a blackout, the computer still powers on but the screen is always black. What could be wrong?

[DangerousPirate]

After a blackout had occurred, my computer no longer display anything on my monitor. At this point, my PC still powers on as I can still hear it. I tried plugging another device into my monitor and it works.

May you please give some idea(s) on which component(s) might be damaged and how to check if it is or not?

 

[lvt]

Try another PSU to see if the blackout has damaged it.