You should be able to see a bad SCSI line with voltmeter. Just look for signal pins not pulled up. If you find a terminator IC with a low signal pin on it, replace it.
Paul
On Apr 17, 2004, at 1:56 PM, George Mogiljansky wrote:
Speaking of board-level repairs, anyone have sources (sites or newsgroups) I can consult?
I have a sickly PowerBook 3400 (won't boot unless a powered external SCSI device is attached, i.e. the active termination supplied by the SCSI bus has been damaged (?). It may be nothing more than the metal strip (framing the external HD-30 port) having a break or a gap (not so on my Wallstreet HD-30, unless the connectors are different)).
George
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