I have got a dell precision 380 that was working fine on yesterday. When i came to office this morning i saw a blue screen error. SO i restarted the computer, it worked fine. But anyway i removed some recently installed softwares unplugged and replugged all attached hardware. (now the comp is connected only with kb and mouse)
But now my usb ports are not working. I suspect it with the usb controllers (bcoz tried with different usb ports and devices). i choosed load defaults option in Bios, still the same. After that i connected ps/2 keyboard still the same. After that i resatarted and disabled usb controller option and enabled ps/2 option. Now i can connect ps/2 kb and mouse. But when i enable usb controller option i cant access both usb and ps/2. I dont know do i need to check anyother setting in BIOS or any hardware problem?? Also during startup the OS recognised the kb (i can see three lights blinking on the kb) but when it come to unlock screen i see only light on numlock and no other lights and i cant do anything on the kb from that point..
Note: Once i disable usb in bios i cant see usb controllers under device manager