ps2 and usb stopped working

I unplugged a USB drive when suddenly the PC powered off and when I booted it again neither USB nor ps2 ports was working.but the front usb ports seems to be working having said that now I'm stuck with (press F1) screen I tried the following to solve the problem with no success
I used a USB keyboard on the front USB port but it's not working I cleared the bios to reset it to default but didn't work too
if there's any way to solve this please help
I am using ECS motherboard model p4m890t-m v2.0
1G ram
everything else working good (hard diskpwscd drive)
I have been using it for 5 years

Might not work… but give this a try.

 

• Shut the computer down
• Unplug the power cord
• Hold your power on button for at least 20 seconds
• Plug cord back in
• Try to restart system

It's a long shot but things might "wake up".

 

Let us know what happens.