With a six year old PC I would invest in no more than a new PSU. If nothing at all happens, that's a likely culprit.
I went to turn my desktop on the other day. I hit the gateway button on the front but nothing happened. No lights, not fan, no noise. I unplugged everything for the CPU and unplugged the power cord from the surge protector. I plugged it in directly to the wall. same result no lights, no fan, no power. The monitor and other things plugged into the surge protector work fine. I dont know what is wrong or how to fix it? Does anyone have any suggestions? The desktop is about 6 years old.