Replacing the SIMM
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c. Push the SIMM gently down and in to seat it firmly in the socket.
The SIMM is keyed to prevent incorrect installation. Do not force it if
it does not slide easily into the socket.
d. Tilt the SIMM into its locked position.
You may hear a “click” as the spring latches engage the ends of the
SIMM.
4.
Set the DRAM configuration jumpers to match the memory you have
just installed, as described in “Setting Jumpers.”
NOTE:
You may feel a slight resistance as the SIMM comes to its
locked position. If the SIMM does not lock, do not force it. Remove the
SIMM, reinsert it, wiggle it gently as you press it into the socket, and
try to tilt it into its locked position. It is very easy to damage the SIMM
socket by forcing a SIMM into its locked position.
NOTE:
The hub self-tests include an optional, exhaustive DRAM self-test.
This test is turned off by default. You should turn this test on to check the
newly installed memory. For information on activating this self-test, see
“Boot Configuration Menus” in Chapter 4, “Configuring the Model
281xSA Hub for IP/IPX Networks.”
