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

Note If one of the memory modules is faulty, you can still operate the
router with just one of the memory modules (4 MB) installed.
However, the remaining memory module must be installed in
the rear socket. When you receive a replacement memory
upgrade from HP, remove the remaining good memory module
and send it, along with the faulty module, back to HP.
Figure 6. Removing Memory Module
Troubleshooting
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