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- Newsgroups: comp.sys.mac.system
- Path: sparky!uunet!gatech!destroyer!news.iastate.edu!vincent1.iastate.edu!bassman
- From: bassman@iastate.edu (Bass Genius)
- Subject: Re: IIsi sound problem
- Message-ID: <bassman.714437931@vincent1.iastate.edu>
- Sender: news@news.iastate.edu (USENET News System)
- Organization: Iowa State University, Ames IA
- References: <92224.205851BGD1@psuvm.psu.edu> <1992Aug17.191610.1378@gvl.unisys.com> <1992Aug21.194937.29773@talon.ucs.orst.edu>
- Distribution: usa
- Date: Fri, 21 Aug 1992 22:58:51 GMT
- Lines: 34
-
- In <1992Aug21.194937.29773@talon.ucs.orst.edu> hinr@hobo.ECE.ORST.EDU (Robert Hinz) writes:
-
- >Well here is my $0.02 about this problem. At least for me the problem
- >does appear to be the connection between the speaker/led contacts and
- >the mother board. The first thing I noticed was my power LED on the
- >front of the IIsi was getting dimmer and sometimes flickered. Then the
- >sound started to flake out too. I found that a light slap to the side of the
- >IIsi case would fix both problems temporarily. I suspect that this problem
- >is caused by electrolysis between two dissimilar metals in contact with each
- >other while a current passes through them. The metal with the lower galvanic
- >voltage will corrode breaking the contact. I have yet to take the thing
- >apart to verify this. If I find anything when I do I will summarize to the
- >net.
-
- You are on the right track. The fan at the back of the case draws cool air in from the front of the case to cool the motherboard. Small dust particles
- collect on the connection of the speaker board and the motherboard. To fix
- this, carefully remove the speaker. It will pull forward and up. Clean the
- contacts with an eraser and replace. This works EVERY time for me.
-
- If anyone has questions, feel free to get in touch
- ******************************************************************************
- * ! *
- * Jeremy J. Dearduff | If you haven't gotten where you are *
- * bassman@iastate.edu ! going, you aren't there yet! *
- * tac40@ccvax.iastate.edu | G. Carlin *
- * ! *
- ******************************************************************************
-
- >Rob Hinz
- >Electrical and Computer Engineering
- >Oregon State University
- >hinr@ece.orst.edu
-
-
-