|In some situations, my PC wont power up. I press the power on button, but it is totally dead - no lights, no fans spinning. But most of the time, it all powers up and runs perfectly ok.|
In the past few months, I've found that the machine always fails to power up if it is connected to a router that is already switched on (Before that, I never used to leave my router switched on). If I switch off (or unplug from) the router before I push the PC power button, then the PC starts OK. If I push the power button while the router is on, then nothing happens. The moment I unplug the network cable, the PC springs into life by itself. Usually.
But it gets worse. I normally switch my PC on every day. If I go away for a few days, then when I come back, it often wont power up, even if I've switched off the router first. If I switch off the PC power switch on the back and wait 10 secs, I see a brief flash of the power button LED, and brief flick of the fans. The when I switch back on, I can sometimes power up ok.
But not always. Sometimes even then it remains dead. The other day, after many off-on cycles with no luck, I left it. 15 mins later, all by itself, it sprang into life.
The problem seems to be gradually getting worse.
Does this sound like a power supply problem?
I've tried re-seating all the power connectors.
The Machine is an Aries 2600, about 4 years old, with WinFast 760GXK8MC motherboard. I did add some extra memory and an extra hard drive a few months ago.