Mac Mini AHT error code:  2MLB/10/4: $0004.89f1

Have Mac Mini G4 1.42 purchased in 2005, upgraded by Apple service center to 1 Gb and never used - sat in box. I recently starting using it after putting and experienced random kernel panics and application crashes. Ran AHT which produced error code on second pass: 2MLB/10/4: $0004.89f1 .
Thinking this was RAM, replaced RAM with quality 1 Gb stick, ran AHT again, but on third pass received same error code, 2MLB/10/4: $0004.89f1 .
I am interested in knowing EXACTLY what this error code means - cannot believe this is not online anywhere. Can anyone with an error code listing tell me? I already suspect this machine will become a paperweight.
If so please post and/or email scotsilv AT aol.com
Thanks
Scot

...I noted that my machine's Boot ROM Version is: 4.8.9f1
So, $0004.89f1 is simply the boot rom version and 10/4 the OS.
Appears I had a loose Airport card, which when tightened seems to have made the machine stable.

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