PC works but the monitor shows no signal

[tageneislover]

Hello there. Yesterday, my computer was making strange buzzing sounds. I opened it and cleaned it, but after that, both the buzzing noise and the monitor signal were gone. I tried connecting the VGA cable to the motherboard's VGA port, I tried unplugging the GPU and RAM and I tried holding down the power button for 60 seconds twice. None of them worked. Although, I also tried connecting my PC with an HDMI port from the HDMI port of the GPU to an HDMI port of my TV and it detected the device...without showing signal either.

 

[ragnar-gd]

That "strange buzzing sound" could signal, in the worst case, something in your PC died, i.e. something in the PSU, or the MoBo.

You say "PC works". How do you come to say that? Most probably the fans are running (at full speed or do they turn down after a while?), and HDD shows it gets power, but beyond that?

 

[tageneislover]

That "strange buzzing sound" could signal, in the worst case, something in your PC died, i.e. something in the PSU, or the MoBo.

You say "PC works". How do you come to say that? Most probably the fans are running (at full speed or do they turn down after a while?), and HDD shows it gets power, but beyond that?

The fans work at full speed (without any slow downs), the DVD driver works, all USB devices (mouse, keyboard, speakers) show that they're on and the lights on the front are on as usual.

 

[ragnar-gd]

The fans working at full speed are not a good thing. If your PC was working correctly, they would slow down after some time.
As they don't, it shows the BISO does not start, so, your MoBo does not start completely, it just provides power.

Maybe your PSU is gone, maybe your MoBo, maybe both.

You need a replacement PSU to check. Can you get any? If not, you'll have to visit a shop with a repair-booth.

 

[tageneislover]

Well, by consistant speed I meant that the speed does not really change eveey few seconds. Although I've noticed that the consistant speed changes after a while.

It's pretty strange, but the problem is most likely the mobo, as you said.

 

[ragnar-gd]

If you exchange the MoBo, but the old PSU is the culprit, the old PSU may kill your new MoBo, so check the PSU first!
If you are lucky, exchanging the PSU solves your problem, which is also a reason to try this first.
Just don't buy a PSU yet, test it first.