Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!wuarchive!uwm.edu!lakesys!macak
From: macak@lakesys.lakesys.com (James Macak)
Newsgroups: comp.sys.mac.hardware
Subject: Mac Plus Screen Completely Black
Summary: Why intermittent dark screen?
Message-ID: <1737@lakesys.lakesys.com>
Date: 11 Mar 90 01:24:26 GMT
Reply-To: macak@lakesys.UUCP (James Macak)
Distribution: na
Organization: Lake Systems - Milwaukee, Wisconsin
Lines: 37

HELP!  I'm feeling a bit paranoid lately...

I installed another 2 Megs of RAM into my Mac Plus this week (bringing it to 4
Megs) and all seemingly went fine.  However, the next day, I came back into
the room to find my Mac's screen completely dark.  (No, it wasn't a screen
saver!)  I blindly moused around to no avail and then gave up and hit the
programmer's reset switch.

Reboot: Mac screen still black.  A sinking feeling....

I tapped the Mac case gently on the left side (near the front) and the screen
came back, looking quite normal.

A few more taps occasionally sent a brief shimmer of black across the screen,
but it didn't stay.  Today, all is well, so far...

I have _never_ noted any screen anomaly whatsoever before this... no screen
waver, shrinking or anything, as I have seen described when a power supply is
about to go.  I have used a Kensington System Saver fan on the Plus since day
one.

So, do I have a loose connection caused by "cracking" the Mac to install the
RAM?  Or is this another symptom of a power supply starting to go?  What
should I check?  (I have no electronic testing tools save for a volt-ohm meter.)

Thanks for any assistance!

Jim
macak@lakesys.lakesys.com (James Macak)

P.S.  Gee, a hardware article posted _only_ to comp.sys.mac.hardware... how
refreshing!    ;-)

-- 

macak@lakesys.lakesys.com (James Macak)     "I'm curious, Doctor, why is it
      << All my own opinions. >>              called 'M-5' and not 'M-1'?"