Replaced the mobo (Gigabyte GA-78LMT-USB3), CPU (AMD FX-4300 Vishera), and RAM (G-Skill RipJaws 4MBx2) in an older system running WinXP (planning to upgrade to Win7 ASAP). Everything booted up just fine, but the HP keyboard and the Logitech mouse, both of which which work fine on another computer, aren't being recognized at all by the computer. No error messages, just not working. Not even lighting up. We've tried every USB port on the system, and even used a USB-PS/2 adapter to try it that way, to no avail. I'm out of things to try. My only thoughts:
1. Could USB be disabled in BIOS by default? If so, how do I change that without a keyboard and mouse, when I can't even access the BIOS?
2, Could the USB system on the new motherboard be defective? How do I test that?
3. Is there any possibility at all that it's related to the Antec 500W PSU--perhaps not enough wattage for this system? (Hard drives are all pretty old.)
1. Could USB be disabled in BIOS by default? If so, how do I change that without a keyboard and mouse, when I can't even access the BIOS?
2, Could the USB system on the new motherboard be defective? How do I test that?
3. Is there any possibility at all that it's related to the Antec 500W PSU--perhaps not enough wattage for this system? (Hard drives are all pretty old.)