Installation Guide HP J2443A 8-Mbyte Memory Upgrade for the HP Router 650 1994-08

Troubleshooting
After you have installed the memory upgrade, if the LEDs
during the power-on self-test indicate a routing engine failure
(refer to table 3-1, “LED Error Patterns During Power-On
Self-Test,” in chapter 3 of the router’s Installation Guide), the
cause could be a failure of either of the memory modules or of
the routing engine. To determine which is faulty, use the
procedure in table 1 below.
Table 1. Troubleshooting Routing Engine Failure After Installing Memory Upgrade
1. Remove the routing engine from the router, using steps 1–9 of the procedure “Install the memory
upgrade,” page 5.
2. Disengage the
front memory module by pulling the retainers alongside the ends of the module outward
with your thumbs and tilting the top of the module forward with your fingers until the module clears its
retainers. (See figure 6, page 10.) Remove the memory module from the socket.
3. Reinstall the routing engine, using steps 15–17 of the procedure “Install the memory upgrade,” page 5.
4. Switch on the router power, and check the LEDs during the power-on self-test for a routing engine
failure.
If there is a failure: either the memory module in the
rear socket or the routing engine is faulty.
If there is no failure: either the memory module you
removed from the front socket or the routing engine
is faulty.
1. Remove the routing engine from the router.
2. Remove the memory module from the rear
socket, then install the other memory module (that
was originally in the front socket) in the rear
socket.
3. Reinstall the routing engine.
4. Switch on the router power, and check the LEDs
during the power-on self-test for a routing engine
failure.
1. Remove the routing engine from the router.
2. Remove the memory module from the rear
socket, then install the other memory module (that
was originally in the front socket) in the rear
socket.
3. Reinstall the routing engine.
4. Switch on the router power, and check the LEDs
during the power-on self-test for a routing engine
failure.
If there is a failure: the
routing engine is faulty.
If there is no failure: the
memory module that was
originally in the rear
socket is faulty.
If there is a failure: the
memory module that was
originally in the front
socket is faulty.
If there is no failure: the
routing engine is faulty.
Troubleshooting
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