Re: help needed - //e just broke

[raymac@crl.com (Raymond D. McAnally)]

David R. Villegas (mnementh@netcom.com) wrote:
: The selftest on my beige enhanced //e says

: RAM     0 0 0 0 0 1 0 0

: How do I interpret this?  If a RAM chip is bad, which one is it?  I can take
: a guess but I want to be certain before I go about desoldering chips.
: Of course, the Apple Service Technical Procedures manual uselessly says
: "Replace Logic Board."

: And should I worry that any other components are broken?  BASIC seems to
: be working fine.  A quick test of memory demonstrated that some locations
: (starting at $B02D) consistently have bit 2 wrong.  If I poke in a 0, a peek
: returns a 4 and vice-versa.  And the stray locations are always the same ones.

Look at the mother board. You'll see that there are 8 chips. Just as 
there are 8 numbers in your display. The one shows the bad chip. ie. 3rd 
chip from the right. replace it. I'm not sure if that read out is for the 
chip on the Mother board or the extended RAM card though. try running the 
test with the card out to be sure. Also, my chips are all socketed. When 
did Apple start soldering them in? If you discover that yours are also 
socketed, try jushing them all in first. They do work out a little over 
the years.
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     MAC				        	raymac@crl.com
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