HP J Class Owner's Manual page 170

B-42
12.
Press firmly and evenly on the SIMM to ensure that it seats
properly.
13.
To replace the CPU Assembly in the system unit, first align the
top of the CPU Assembly with the guide on the system unit. Re-
fer to Figure A–24 and to the label on the back of the assembly.
Be sure to support the CPU Assembly properly while replacing
it.
Figure A–24. Replacing the CPU Assembly