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From: mday@cgl.ucsf.edu (Mark Day)
Newsgroups: comp.sys.mac
Subject: Re: Mac II is acting flakey! Ideas?
Message-ID: <10391@cgl.ucsf.EDU>
Date: Thu, 10-Sep-87 00:39:01 EDT
Article-I.D.: cgl.10391
Posted: Thu Sep 10 00:39:01 1987
Date-Received: Sat, 12-Sep-87 04:33:34 EDT
References: <2005@Shasta.STANFORD.EDU>
Sender: daemon@cgl.ucsf.edu
Reply-To: mday@socrates.ucsf.edu.UUCP (Mark Day)
Organization: UCSF Computer Graphics Lab
Lines: 30
Keywords: sometimes no beep on bootup

In article <2005@Shasta.STANFORD.EDU> mrh@Shasta.STANFORD.EDU (Marc Hannah) writes:
>
>   After 5-6 hours of consecutive work last night with my Mac II (with no
>problems after 2.5 months) I ran into problems booting this morning. The
>first time I powered on I did NOT get the Boot Chime and none of the usual
>procedure occurred. The screen was lit but nothing happened,
>...  Obviously it looks like a hardware
>problem and I'm taking it in for (warrenty) repairs but I thought I'd post
>to get feedback and other people's experience.

Apple sent out a service alert on 8/27 with regards to an intermittent 
problem during the bootup sequence of a Mac II equipped with an internal
20SC.  I don't know if your drive is 20 meg, but if so it may need a new
drive EPROM.
Quoting from the Apple Alert:
"To locate the drive EPROM on the hard disk's PCB, look for the only
rectangular 28 pin chip.  In front of the chip (the side facing the 50 pin
connector) the location U12 is printed on the board. Once the chip has
been identified, look for the revision number on the chip's label under the
heading 'E-P'.  If the revision level is 2.6A the chip should be replaced."

The drive EPROM chip is Apple part number 927-0002.  Hope this helps those
folks out there lucky enough to have a Mac II to have problems with.

Mark
----------
		Mark Day
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