Path: utzoo!mnetor!uunet!husc6!uwvax!rutgers!ames!lll-tis!afit-ab!lriggins
From: lriggins@afit-ab.arpa (L. Maurice Riggins)
Newsgroups: comp.sys.mac
Subject: Re: Screen Jitter on a Macintosh SE - a Fix? (long)
Message-ID: <264@afit-ab.arpa>
Date: 13 Jan 88 04:29:02 GMT
References: <8801122138.AA04420@decwrl.dec.com>
Reply-To: lriggins@afit-ab.arpa (L. Maurice Riggins)
Organization: Air Force Institute of Technology; WPAFB, OH
Lines: 38
Keywords: SE Screen Jitter

In article <8801122138.AA04420@decwrl.dec.com> long@viking.dec.com (Rich Long - LJ02 - DTN 226-2598) writes:
>Hello everyone, 
>
>This is my first USENET posting, so please forgive me if I do anything wrong! 
>
>I'm having a problem with my Macintosh SE that I hope has a cure: It has had a
>screen jitter almost since the day I bought it.
>
	<deleted text>

>Rich Long

Rich,
	You're not alone.  I bought one in June and had it back to the dealer
by August.  The screen was wavering in the upper left corner.  He tried several things including replacing the crt.

Bottom Line:  Unplug the fan - the interference is gone!  Of course, this was
done with the case off... You couldn't leave it that way.

His techs checked their Apple connection who confirmed the problem and said
Apple was working on it (the checks in the mail).  My dealer committed to 
provide the fix free if Apple does ever release one, free or not.

The fan is a really poor design anyway...a noisy squirrel cage with closed 
ends, and the motor and wiring is close to the deflection coils of the crt.

Yes, my problem is getting worse.  I suspect it's because of dust collecting on
the fan and slowing it down.  Try this.  Put your hand over the fan outlet
blocking the flow.  Does the interference increase?  Maybe cleaning will help.

NETWORLD - Anyone heard of a fix?  Or as I've heard rumored is Apple only
considering the SE a short term system not worth the recall (e.g. //c timing)
of the tons of SE's they've sold.


-- 

Maurice                lriggins@afit-ab.ARPA