BBC model B sound issues

[Mark Hennessy]

I suppose the analogue stages can be ruled out. I'm not sure what could cause the symptoms you describe, as I'm not completely sure about where precisely the start-up noises originate from... Or rather, I'm not sure where the "burrrr" comes from, but I'm fairly sure that the final "beep" is generated by the OS - it's the default beep you get when you press the Copy key, type VDU7 (or ctrl+G) or do a ctrl+Break. So, if you're sure that it is definitely producing that "beep", then it might be a rather more obscure problem.

Cheers,

Mark