20 months ago I ended up replacing a majority of my components trying to track down the source of random corruption across all of my hard drives (turned out to be the power supply). Well, yesterday I tried to sync my iPod and received a 'found unrecognized USB device' message, which I found quite odd. I rebooted the computer and got the same message. Then I also noticed that my battery backup was shown as not being connected (via USB). My USB mouse and keyboard worked just fine, however. Then 'it' happened. About a minute after the reboot, the computer powered down. Pressing the power button did nothing, no lights, no beeps, no fans, nothing. I wiggle plugs, remove components, all the way down to removing the motherboard, and pulling all the components except for the CPU. I hooked up a brand new power supply, and shorted the power switch leads, and still got nothing. I used to game, but had recently been using it more for web browsing and other low-intensity applications. Upgrading the motherboard would mean I'd have to buy new RAM, CPU/cooler, and video card at the same time. This is not an investment I need to make anytime soon. I can still find the board online (MSI K8N Neo2 Platinum) from a few dealers (and eBay), but was looking for some people's opinions on how sure I can be that this is strictly a motherboard problem. It all comes down to me not wanting to drop $150+ on an antiquated motherboard if that's not going to solve the problem. I'd like to simply replace the motherboard, but if that's not going to fix it, I'd rather skip right to a full system upgrade.