Old computer was switching on but nothing comes up on screen.
But the PSU would emit a hissing/humming sound before i've even pressed the power button on the PC.
So I tried a Corsair CX400 from my other PC. But all i get is the PSU fan spinning fro a second then off. And then the PSU fan starts switching itself on for a second then off again with no input from me. And continues to do so even if I switch it off from the PSU switch.
Only if I disconnect it from either the mains or the motherboard does it stop.
But then I tried a cheap (as in £10) 300W PSU and it switches on with no problems and everything appears on screen.
I was planning on installing a good PSU, not this cheap one. Any idea whats causing this problem?
But the PSU would emit a hissing/humming sound before i've even pressed the power button on the PC.
So I tried a Corsair CX400 from my other PC. But all i get is the PSU fan spinning fro a second then off. And then the PSU fan starts switching itself on for a second then off again with no input from me. And continues to do so even if I switch it off from the PSU switch.
Only if I disconnect it from either the mains or the motherboard does it stop.
But then I tried a cheap (as in £10) 300W PSU and it switches on with no problems and everything appears on screen.
I was planning on installing a good PSU, not this cheap one. Any idea whats causing this problem?