SCSI problem

Hi,

I just unpacked my old Mac (Twentieth Anniversary Mac TAM, similar to
the PowerMac 6500/250), and it is no longer seeing its internal CDROM,
nor allowing any external scsi devices...

SCSI Probe can see that there is a "ROM" drive but the name of the drive
is garbage... If I try start up with external scsi's attached, it wont
go past the "grey screen".

What can I do try to fix this? I live in Australia, and there's
basically no techs trained here in how to fix a TAM...


Cheers

Travis