Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!njin!uupsi!rpi!zaphod.mps.ohio-state.edu!think!mintaka!oliveb!orc!mipos3!omepd!mipon2!dan
From: dan@mipon2.intel.com (Dan Casali)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Mac+ monitor problem
Message-ID: <5450@omepd.UUCP>
Date: 18 Jan 90 20:49:07 GMT
References: <1358@cb.ecn.purdue.edu>
Sender: news@omepd.UUCP
Reply-To: dan@mipon2.UUCP (Dan Casali)
Distribution: usa
Organization: Oregon Microcomputer Engineering, Intel Corp., Hillsboro, OR
Lines: 16

In article <1358@cb.ecn.purdue.edu> kimdan@cb.ecn.purdue.edu.UUCP (Daniel Kim) writes:
>Hi,
>I seem to have a little problem with my monitor on my Mac+.
>Every once in a while when I try to start up my Mac
>from cold start , I get a black screen execpt for a white
>line down the middle of the screen. I tried thumping it on the
>left side of the Mac, and sometimes, the screen will come on.

Check the connections to the deflection yoke (the thingamabob that sits around
the neck of the video tube.  The fact that you have high voltage (screen not
all black) indicates much of the horizontal deflection circuitry is working.
The yoke should plug in to the analog board.  If re-seating it doesnt due the
trick, try re-soldering the connector on the board.  Your yoke could have
an open circuit as well.  If you are lucky, you could detect this with
an ohmmeter (which pins? damifino).   Good luck....
			-dan casali