Elesys 5450, Reference Manual

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58
Troubleshooting a
Memory Upgrade
A memory upgrade/installation can fail for several
reasons:
1) In a two-memory-board installation, a single-
sided memory card has been installed into slot 1
that does not have a PD jumper.
2) A memory board is not seated properly when
installed.
3) Memory is installed correctly but is of insufficient
size.
4) One or both of the memory boards has failed.
Check the following tables for the symptom you are
experiencing to identify a course of action.
Symptom Most Probable Causes What to do
The Diagnostic Test
Page indicates that the
controller is
recognizing memory,
but it is not of the
expected size.
1) The SIMM installed in
slot 1 is not a
double-
sided memory card .
Procure a SIMM that is double-
sided and install into slot 1.
2) The SIMM installed in
slot 2 is not seated
properly Properly re-install the SIMM in
slot 2.
3) The installed SIMM(s)
has (have) a memory
size that is
actually
smaller than it’s
specification.
a) Check to make sure the board
part numbers are correct for
the SIMM size. If not, obtain
and install the correct ones
for the desired memory size.
b) The SIMM could have a fault
in which it only reports part
(for example, one-half) of the
memory for which it is rated.
In this case, the board must
be returned to the vendor for
replacement.
Table B-1.2. Troubleshooting – Incorrect Diagnostic Test Page.