On Sat, Apr 17, 2004 at 01:09:21PM -0800, George Mogiljansky enlightened us thusly
> Hello,
> For board-level repairs, what is a good website or
> newsgroup?
> Briefly:
> My PowerBook 3400/180 hit the floor and now boots from
> the internal IDE HDD only if a powered external SCSI
> device (CD-Rom or HDD) is attached. I tried another
> internal HDD, no change. Choice of OS doesn't matter.
> Both internal HDDs work fine in another PowerBook.
>
> I can provide more detail, such as:
> "..the SCSI-bus has built-in active termination..the
> SCSI port supports ANSI X3T9.2.." plus pin
> assignments, etc.
>
> George
Put a 'scope on the bus and ckeck the logic levels. I'll bet they are
borderline fail somewhere, and that extra drive is acting as a pullup
or pull down, and making things borderline pass.
--
With best Regards,
Declan Moriarty.
--
Author: Declan Moriarty
INET: [EMAIL PROTECTED]
Fat City Hosting, San Diego, California -- http://www.fatcity.com
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