Anyone out there had some experience in troubleshooting problems with this BBC?
Issue is with the keyboard (or related to it). Computer powers on (red shows), Caps Lock LED lights up then off, computer beeps then Caps Lock LED remains on. Only key on the keyboard that does appear to work is the 'Break' key. Have pulled everything apart and the internals of the computer look in really good condition. No blemishes on the PCB, wiped down the keyboard PCB to ensure it was clean (looked brand new to start with) and no change.
Have spent a couple of hours looking through Google results and no reference to this type of problem. Have powered computer up without the disk drive connected and same problem.
Next step is probably to check the cable connection between keyboard and motherboard but visual inspection looks fine - no loose wires.
Any other ideas out there?