Dell Inspiron 8600 Owner's Manual page 117

Ground yourself and install the new memory module:
9
NOTE: If the memory module is not installed properly, the computer may not boot properly. No
error message indicates this failure.
Align the notch in the module edge connector with the tab in the connector slot.
a
Slide the module firmly into the slot at a 45-degree angle, and rotate the module
b
down until it clicks into place. If you do not feel the click, remove the module and
reinstall it.
Adding and Re placing Parts
117