So I recently picked up a nice condition IBM 325T with the 386SLC processor. I installed a cd rom drive, 5.25” floppy, and upgraded the hard drive and dropped in an awe32. It was working beautifully. I just received a 387SX math coprocessor I ordered and installed it. It booted up fine and I went straight to the BIOS to check it - it detected the math coprocessor without issue, but then my keyboard stopped responding. So I rebooted and got keyboard and mouse errors at post, tried different keyboards and mice same thing, removed the co-processor - no change, tried unplugging for a while and even removing the battery - no change. Everything looks fine on the motherboard. Could the co-processor have fried something? This is so disappointing.