Only had 2 USB ports. One has my printer the other had my dongle for embroidery software that I use. Removed dongle to download pictures from camera. This was successful. Put dongle back in and computer did not recognize it. Tried reinstalling driver, driver couldn't find dongle that was plugged in. Tried rebooting with no success. Finally tried installing different motherboard that I had. While inserting P4 CPU the little "fasten down arm" broke off so I taped it down. Finally got everything hooked back up and got this message:
CMOS checkshum error- Defaults loaded
Warning! CPU has changed or CPU ratio change fail
Please re-enter CPU settings in CMOS setup and remember to save before quit
Unable to get into CMOS keyboard frozen, tried rebooting several times. Put everything back on original motherboard and tried to bring it up and got the same message.
Figured it must be CPU. Got new CPU and fan ..same results. Techs I am acquainted with advised that it was a bad memory stick. Got new memory stick. Now have new CPU, Fan, and memory stick..still get the same message!