Macintosh 128k Sad Mac Error Code: 040008

[olePigeon]

I have a Macintosh 128k and it gets a Sad Mac error code:  040008

http://www.mac512.com/macwebpages/sadmac.htm

So, I think it's bad memory perhaps?

04XXXX = Memory test - Mod3 test  Memory chip failure- See Single Chip ID below

Bit  Loc  Sub Code

10   G7   0400

Sub Code:

YY0008 Trace

So Memory test failed, but I'm not sure what the Trace means.  Perhaps I just need to replace the RAM chip?  Guess it wouldn't hurt.

 

[uniserver]

yup

 

[uniserver]

but a more permanent fix is just to replace all the ram, its big job, but a proper fix.  More chips are going to go bad as time passed if you don't change them all.

 

[olePigeon]

What's the main reason for the RAM to go bad?  Just use?  Electrical wear and tare?

I think I have a 512k board I can raid for RAM chips.

 

[uniserver]

just was bad ram from the get go,  some have said silicon contamination.    mostly its the Apple logo'd micron ram.

 

[mori512k]

Jameco has ram chips. There is a link somewhere on the forum. I might have some left over from my two 512k's.

PM me Doug, and I'll see if I have enough on hand.