Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!uakari.primate.wisc.edu!relay.nswc.navy.mil!oasys!timsmith
From: timsmith@oasys.dt.navy.mil (Timothy Smith)
Newsgroups: comp.sys.mac.hardware
Subject: Mac+ startup problems
Message-ID: <7703@oasys.dt.navy.mil>
Date: 13 May 91 17:42:21 GMT
Reply-To: timsmith@oasys.dt.navy.mil (Timothy Smith)
Distribution: na
Organization: David Taylor Research Center, Bethesda, MD
Lines: 23

Configuration:  Mac Plus w/ original 800k floppy drive and external
    hard disk.

Symptoms:  First noted problem when system began repeatedly restarting.
    Shut down when I noticed a curl of smoke coming out of the vents
    above the analog board.

    Since then, I've bought Pina's _Macintosh Repair Secrets_, and tried
    checking voltages, resistances, looking for scorch marks etc.  The
    behaviour doesn't seem to be covered in the book:  when the voltage
    is turned low enough to avoid the flub-flub-flub sound made by the
    the overvoltage protection circuit, the disc drive repeatedly (about
    3-4 times a second) tries to eject a disc.

    Blank screen, no startup bong.

Does anyone have any suggestions about what is wrong, or what it'll
take to fix it?

-- 
--- Tim Smith ---  timsmith@dtoa1.dt.navy.mil ---- (301)227-1611 ---
--- Code 1522, David Taylor Research Center, Bethesda, MD  20084 ---
---------- I don't get paid enough to speak for the Navy. ----------