Proliant DL360 gen8 accepts no keyboard input

Hello,

One of our servers ran into trouble recently, it started freezing during reboot.

Now, the server recognizes no input from the USB ports, I cannot use a keyboard. Things I tried:

1) All USB ports, looking for the numlock light on the keyboard.

2) Resetting the BIOS via switch 6. I rebooted with the switch toggled, got the message then changed it back.

3) I've tried using the Remote Console through ILO 4 (updated to 2.03).

4) I've tried using the standalone remote console.

...whatever I try, it accepts no keystrokes (F9, F10, F11 etc)..not even through the Remote console(s).

I suspect USB may have been turned off in the BIOS...but I cannot access the BIOS without pressing F9.

Can someone please give me some advice on how to debug this?

Thanks in advance