RE: MSI K7T Pro 2-A
I had the same problem!
I installed this board when I built my last system about two years ago. I used an AMD Duron 750 processor and I have to say I was very happy with the system once I got the IRQ issues sorted out by disabling Windows PNP to allow the BIOS to assign resources. Fo a long time everything worked flawlessly (Including my SB PCI 512 sound card and nearly obsolete Diamond Viper II Z200 graphics card.)
After about a year I experienced a total system crash and couldn't even boot into BIOS. All 4 DLED's lit red. I suspected a BIOS virus so I went to the MSI website for the how-to on flashing the BIOS. I found numerous forum postings (at MSI and other tech sites) describing the identical problem from people whose MSI K7T Pro 2A board had up and died after about a year of use.
After trying everything else (Including a different HD, RAM and processor, I changed out the MSI board for a FIC AZ11EA and reinstalled everything, including the original RAM, Duron processor w/fan and HS, etc. Problem solved- it was definitely a toasted board.
A year doesn't seem like a long time for a mainboard to last, especially a pricey one like the MSI, just long enough for the retailer's warranty to be worthless. I tried to get some satisfaction from MSI- a partial refund, a replacement, whatever, but they never responded to my emails. Bottom line: they may be a great company but they lost one customer for good.