Path: utzoo!attcan!utgpu!jarvis.csri.toronto.edu!rutgers!dptg!att!shuxd!devildog!uxrd15!thk
From: thk@uxrd15.UUCP (Tom Kiermaier)
Newsgroups: u3b.misc,u3b.tech,comp.sys.att
Subject: Re: 3B2 problems galore
Message-ID: <810@devildog.UUCP>
Date: 31 Aug 89 15:26:40 GMT
References: <19137@gatech.edu>
Sender: nuucp@devildog.UUCP
Reply-To: thk@uxrd15.UUCP (Tom Kiermaier)
Organization: AT&T IMS - Piscataway, NJ
Lines: 20

In article <19137@gatech.edu> jkg@gatech.UUCP (Jim Greenlee) writes:
>reason. When I try to boot them, the power light comes on and stays on, but
>the diagnostic light goes "flash, flash, flash, flash, flash, flash...pause"
>and repeats this pattern over and over. Somebody here at Tech who has worked
>rather extensively with the 3B2s suggested that maybe the boot ROMs were bad.
>I swapped out the ROMs with known good ones, but nothing changed.

If the LED is really pulsing 6 times then you've got a very strange
machine.  Below are the usual LED pulse failure indicators:

PULSE                      CAUSE
-----               -------------------
1                   Unknown cause, rare
2                   Problem with the CPU
3                   Problem with firmware (ROMS)
4                   Problem with RAM
5                   Problem with DUART


					Tom Kiermaier