[G4] Memory Cache Problem 400 Mhz Sawtooth

[Joseph B. Gurman]

     Lynn Persing wrote:

>G4 400 mhz AGP Sawtooth running OS 9.1
>
>I think I've got big problems.  This morning when trying to reboot my
>computer after a crash, my boyfriend discovered this message on boot.
>"Apple's built-in memory test has discovered a problem with memory
>cache.  Please contact an Apple Service Technician.

     Shame on Apple for such a confusing diagnostic message. There's 
cache memory, and there's disk cache (remember that in OS 9 and 
earlier? It's settable in the Memory control panel), and here they've 
gone and cited "memory cache."

     If the problem is really with cache memory, though, you do need 
to bring it to an authorized Apple tech or replace the CPU module 
yourself. If it's just the disk cache, you should be able to reset it 
to the default with a PRAM reset (option-command-p-r at startup until 
you hear the second chime). That might not clear up the problem if 
you have a bad DIMM, though.

     FWIW,

						Joe Gurman
-- 
"I love deadlines. I love the whooshing sound they make as they go by."
                                                             - Douglas 
Adams, 1952 - 2001

Joseph B. Gurman, NASA Goddard Space Flight Center, Solar Physics
Branch, Greenbelt MD 20771 USA