Well, still no progress... The Central still only displays the 'Rio Digital Audio' screen and refuses to boot. Since I have got it working (although only briefly) I assume it might be a bad solder contact somewhere on the board. I have reapplied solder to both the IDE and front-panel connector but to no avail.

When I power on the Central I see some LED's flickering - D1 remains red and D3 seems to indicate activity on the IDE channel. Can somebody please confirm that this is how it works on a working Central - perhaps D1 is a fault indication...

Thanks in advance,
Jeroen