Cannot get my PC running

[Tonu]

Hi!

Got a big problem. Cannot start a PC that has been stayed unused about two years. After pushing the power button, there is only a short "ssss", a flick of lights and nothing more. But the last time the computer was used, it was OK. What may have gone wrong meanwhile? What should I do???

Many thanks in advance for the help,

Tonu

 

[GavinO]

A hissing noise is never good with electronics. This could be a problem in any number of subsystems. The PSU could be having a problem delivering power to spin everything up, the motherboard or the processor could be shot, or, since you mentioned the box has been in storage for a while, something could have gotten inside and be shorting contacts somewhere. I'd recommend taking everything out, cleaning it with canned air, and reassembling. If that doesn't work, you should swap out components for known-good parts one at a time, to lock down what isn't working.