Digital Equipment 3100R Series, Service Maintenance Manual

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FRU Replacement
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Memory Troubleshooting
The DIGITAL Server’s POST can detect memory size, type, and errors when it
boots. The memory size, type, and error can be isolated to a pair of SIMMs on the
installed processor module. The memory error message format is:
<Type of Error> <Location> <Size> <Type>
An example for a single bit memory error:
Correctable Error J10/J11 zz MB EDO SIMMs
An example for a multiple bits memory error:
Uncorrectable Error : J14/J15 zz MB EDO SIMMs
Where:
<Type of Error> Correctable error
Uncorrectable error
<Location> Processor Module J8/J9
Processor Module J10/J11
Processor Module J12/J13
Processor Module J14/J15
If a correctable error occurs, the BIOS will display: “Press <F1> to resume” after the
server boots.
If an uncorrectable error occurs, the server will halt after the memory test.
To isolate to the failing SIMM, replace one of the two SIMMs which was indicated in
the POST error message with a similar SIMM and then rerun POST. If the same
error message occurs, replace the second SIMM with the SIMM that was previously
removed.