My old PSU was giving me problems so I swapped it out for a Corsair AX-750.
Everything ALMOST went smoothly, until I flipped on the machine and tried to boot.
The JMicron controller on my EVGA X58 ended up hanging when it was checking the hard drives that were connected to it (I am not using it as a RAID, I just have hard drives connected to it). After I restarted, it went through, but one of my hard drives wouldn't show up (it's a Seagate 1TB Barracuda - and yes it's the infamous 7200.11, and yes I've already had it RMA'd once). Windows 7 won't see it either. (It's not showing up unformatted or ANYTHING in the Disk Management snap-pin). This hard drive was working totally fine an hour before I swapped out the PSU.
I already tried troubleshooting it a bit. Hooked it up to the Intel controller, used different SATA cables, checked the connections. The hard drive would hang on the JMicron controller, but if I hook it up to the Intel controller, the PC gets stuck in the BIOS for a good 10 seconds longer than it normally does (it DOES see the HD though), then resumes the startup sequence. When it reaches Windows, Windows hangs a bit right at startup (I know this symptom is usually the sign of a hard drive that is dying), then proceeds. When I get to the desktop, the hard drive is nowhere to be seen, nor is it in Disk Management.
My suspicion is whatever I did while I was swapping out the PSU fried the PCB/controller/electronics on the HD, as I hear it spinning up without any problems or clicks.
I'm ready to throw this thing in the freezer to try to get it to work again, but I'd like to get your opinion on this before I do something drastic (and yes, I've done the freezer trick with the previous 7200.11 to rescue the data from it before RMAing it). Any ideas?
Edit: I also tried hooking the hard drive up to a Thermaltake BlacX USB Docking Station that I haven't opened since I bought a year ago. Although the Docking Station is half-broken (power LED won't light up and hard drive won't appear), I DO hear the hard drive spinning up when I hook up the Seagate to it. Tried some other known good hard drives and same thing - they all spin up, so I'm pretty sure it's not an incompatible PSU issue.