Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!snorkelwacker!usc!orion.oac.uci.edu!uci-ics!ajauch
From: ajauch@ics.uci.edu (Alexander Edwin Jauch)
Newsgroups: comp.sys.mac.hardware
Subject: Re: HELP: Mac 512K Video Problems
Keywords: video broke bad repair analog
Message-ID: <25CA27DF.27672@paris.ics.uci.edu>
Date: 3 Feb 90 00:37:51 GMT
References: <11248@attctc.Dallas.TX.US>
Reply-To: ajauch@ics.uci.edu (Alexander Edwin Jauch)
Organization: UC Irvine Department of ICS
Lines: 27

In article <11248@attctc.Dallas.TX.US> torch@attctc.Dallas.TX.US (Jay Finger) writes:
>I know this same type of question has probably been answered eleventy zillion
>times, but I didn't pay attention to them then...

Ready, 11 zillion and one.

>
>I've got a 512KE (which started life as a 128 back in Dec 84!).  Every now

Great! My Plus started out as a "Fat Mac" (512K w/ 400k drives)!

>and then the right edge of the screen will flicker/vibrate/shake (I'm not
>sure how to describe this) rapidly.  Sometimes it's the entire screen
>at once, other times it does it so fast that each scan line gets a
>different amount of distortion so it looks like there's some noise in the
>video.

You have a bad power supply.  More accurately, you probably have a bad 
flyback transformer.  There are several other parts in the power system 
that could cause this but this seems to be the most common.  Try the solder
trick mentioned earlier, if this does not work phone around for a *non apple*
mac repair house.  Apple's standard parts are sub-par as far as I'm concerned.
This problem is fairly common and they should be able to help you out.

Alex Jauch
ajauch@bonnie.ics.uci.edu
Dis: I aint no hero, just a dude.