PSU = Power Supply Unit
CPU = Central Processing Unit
When you turn the computer on, and sure the PSU switch is also turned on, does anything show on the monitor?
Any help will surely be appreciated. here's my problem. My computer doesn't on (My CPU "on switch" is not working) but my cpu is getting any signs of power flowing in it because it has lights like green lights that leads to the power switch from the CPU and fans are not turning on too (well it will turn on if my CPU will turn on too). I just switched it off awhile but when i came back it will not turn on. I already did reset CMOS, pressing the cpu switch for a 20-30 secs, reseating all my hardrives like hard disk, ram, video card, unplugging all of the plugs and plugging it back in but its still not working.