Dell 6400 Owner's Manual page 116

NOTE:
If the memory module is not installed properly, the computer may not boot properly. No error message
indicates this failure.
4 Ground yourself and install the new memory module:
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 down until it
b
clicks into place. If you do not feel the click, remove the module and reinstall it.
5 Replace the memory module cover.
NOTICE:
If the cover is difficult to close, remove the module and reinstall it. Forcing the cover to close may
damage your computer.
6 Insert the battery into the battery bay, or connect the AC adapter to your computer and an
electrical outlet.
7 Reinstall the hard drive. See page 112.
8 Turn on the computer.
As the computer boots, it detects the additional memory and automatically updates the system
configuration information.
To confirm the amount of memory installed in the computer, click the Start button, click Help and
Support, and then click Dell System Information.
116
Adding and Replacing Parts
1 notch
1
2
2 tab