Hi folks, I just get back from a 3 week vacation, and my 4-year-old Acer desktop (E360) refuse to start. In fact, just before I left, the same problem occured. At that time, i managed to 'fix' it by accident by moved the power cord plug into a different socket on the power strip. Yesterday, i tried that, and it wouldn't work. So did some reading online, and thought the problem might be the PSU. Bought a new PSU and and PSU tester from Fry's. Before opening new PSU, i tested with the tester, and it seems that the PSU is fine, all the levels are reported as correct. So then i follow these steps: 1. disconnect power to all components (HDD, drives etc) except CPU and mobo 2. remove all RAM modules except one 3. removed CMOS battery for one minute, then re-insert 4. remove video card, and connected to onboard video 5. checked the mobo visually to see if any capacitors are 'blooming' or burnt, and for any other signs of damage(there is none that I can see, though i have not taken the board out of the case) However, after all this, there is still no beep sounds, so I assume the POST is failing? I'm going to buy a new CR2032 CMOS battery and try that later today. Should i still try the new PSU? or Could it be a mobo problem? Or do i have to try and remove the CPU, even that is something I have never touched before? Some of you might know that I was planning to build a new PC(first time), but i'm worried now that if i cannot resolve this sort of issue, then perhaps I should not attempt to build. Any tips will be very helpful. thanks.