🚀 go-pugleaf

My brother's PC has developed a keyboard error.
I recently fitted a new hard disk to his PC and used my keyboard and
monitor to configure his system ( to save him lugging his monitor and
keyboard to my house).
 It initially behaved rather strange, as I needed to press the reset
button on the PC before the monitor would display anything.
After a few days this oddity disappeared and the monitor displayed the
boot up details from power up without a reset.
However when my brother attached his keyboard and monitor the boot up
sequence checked the memory then gave "error keyboard not connected,
press F1 to continue". Since the keyboard was not operating I could not
press F1 (catch 22).
Tried bruv's keyboard in my PC - no problem.
Tried my keyboard in bruv's PC (as used to configure his hard disk) and
this time the screen would not display anything, even with a reset.
Fitted my HDD controller card and Video card in bruv's PC but still gave
same symptons i.e. no display if using my keyboard and keyboard error
using bruv's keyboard.
Note with no display the system still stalls presumable at keyboard
error.
Keyboard error is immediate after memory check. No Post beeps of any
kind and Dos not started.
I have reset the CMOS settings (with the motherboard jumper) to try and
get the bios to "halt on no errors" which I believe is the default CMOS
settings. This then allows the keyboard error to be displayed and the
next POST check to be carried out. The next POST check is the CMOS
settings, which now needs resetting to the correct hard disk settings
etc. Again catch 22 as the keyboard will not operate I can't reset the
CMOS.

Any ideas ?

TIA
Paul
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