[comp.sys.mac.hardware] No Chime and Black Bands on SE/30

deben@world.std.com (Robert J DeBenedictis) (03/23/91)

My configuration:
SE/30 w/ 5 Meg running 6.0.5 with HyperCard 2.0
Quantum 80 (used to stick, but hasn't in 6 months)
Imagewriter II
Prometheus 2400 MiniFax modem (send only)
MacRecorder

Last night my Mac froze up.  The switch on the side just flashed
the screen (and turned of a few pixels).  There was no chime.  I
turned the Mac off and watched a movie.  Afterwards, it booted up,
but only after hitting the reset switch, which was now chiming.
I immediately backed up the the most important 1440K of data.  About
3 hours later, the screen froze again, same problem.  I went to bed.

This morning it booted up again.  I hope it doesn't die before I
finish this article.  What's wrong with my Mac?  Also, I'm concerned
that whoever takes a look at it is going to say "Board Swap" when it's
just a simple fix.  Are the any hardware gurus out there that think they
might be able to offer a cheaper solution?  Preferably in the Boston
or New England area, but I'm not too picky.

Another Message in the Bottle from
Robert DeBenedictis

deben@world.std.com (Robert J DeBenedictis) (03/24/91)

I fixed this problem, I think, by opening my Mac and reseating
the Apple ROM.  I also wiggled the memory chips, zapped my PRAM
and lowered my ATM font cache from 1024 to 512.

I have a 5 Meg SE/30.  While it was open I noticed that 2 of the
4 256K chips have parity and 2 do not.  Could that cause problems?

Another Message in the Bottle from
Robert DeBenedictis

zalam@pro-angmar.UUCP (Zaki Alam) (03/25/91)

In-Reply-To: message from deben@world.std.com

Robert, you said that your HD used to stick.  Did you have the EPROM of
the HD changed?  I had similar problems and since I had the EEPROM changed
I haven't had any problems with the HD.  Check with you dealer about the
free upgrade (if you still have warrenty).

Zaki.

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