Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!usc!wuarchive!m.cs.uiuc.edu!gillies
From: gillies@m.cs.uiuc.edu (Don Gillies)
Newsgroups: comp.sys.mac.hardware
Subject: Re: SE/30 screen flickers/no it doesn't/yes it does/...
Message-ID: <1991Jun9.202517.14662@m.cs.uiuc.edu>
Date: 9 Jun 91 20:25:17 GMT
References: <12163@skye.cs.ed.ac.uk> <1991Jun8.223327.25416@spool.cs.wisc.edu>
Organization: University of Illinois, Dept. of Comp. Sci., Urbana, IL
Lines: 14

Another way to suppress stray electromagnetic activity is to take the
offending part (in this case, the hard disk) and enclose it completely
inside a metal shield (like tin foil).  I AM NOT recommending this,
merely pointing it out, since it may cause you hard disk to overheat
and fail.  However, if you think it can be shielded or at least
partially shielded without leading to overheating problems, then you
may want to try this method.  Make sure to test it before you bolt
everything back together.  In any event, foil could probably be used
briefly to determine that the electromagnetic interference was coming
from your hard disk.  Make sure you don't short anything out with the
tin foil.  


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