Having an issue in my high end machine that I custom built 5-6 years ago. The last two times it's powered down due to power outages (my battery failed and am getting a new one, but my cheapness kept me from getting it sent expedited and I'm regretting it) I have had no response from the power button or shorting the power leads unless I unplug it completely for atleast 10 minutes. Any thoughts on PSU vs motherboard? My machine is a high end Core2Quad machine with dual RAIDs and if the board is fine, I'd prefer not to replace my entire chipset with a new board and 4 core i5. Any software available to specifically test the power load on the PSU and/or mainboard? I'm getting solid voltages off the PSU when my rig is up, but the downtime is starting to annoy me. Haven't visually inspected the board for bubbled capacitors yet due to lack of time, but I'll be doing that this weekend as well. Unfortunately this time of year in central FL, I can expect a couple of power outages of brief duration per week. When online, my machine plays any game I want and renders video great.