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From: sl195009@silver.ucs.indiana.edu (Toan Hoang)
Newsgroups: comp.sys.amiga.hardware
Subject: Re: Need some diagnosis on my dead Amiga
Message-ID: <41334@iuvax.cs.indiana.edu>
Date: 10 Apr 90 16:51:38 GMT
Sender: daemon@iuvax.cs.indiana.edu
Lines: 6

Although I'm not a wiz or anything. But I have the same thing happened to me
once.  When I plug my digitizer and the color spliter with two power supplies.
My amiga blow up and acted the same way as you described it.  So I suspect 
that probably the ROM chip is blown and I took it to the dealer and have the 
ROM chip replace and now it worked fine.  So, I suggest you tried to changed 
the ROM chip to see what happened.