Dell Inspiron 640M Owner's Manual page 119

3 Remove the hinge cover. See "Hinge Cover" on page 125.
NOTE:
Ensure that you remove the two screws in the battery bay as part of the hinge removal procedure.
4 Remove the keyboard. See "Keyboard" on page 127.
NOTICE:
To prevent damage to the memory module connector, do not use tools to spread the memory-module
securing clips.
5 If you are replacing a memory module, remove the existing module:
Use your fingertips to carefully spread apart the securing clips on each end of the memory module
a
connector until the module pops up.
Remove the module from the connector.
b
1 memory module
NOTICE:
If you need to install memory modules in two connectors, install a memory module in the connector
labeled "DIMM A" before you install a module in the connector labeled "DIMM B." Insert memory modules at a
45-degree angle to avoid damaging the connector.
NOTE:
If the memory module is not installed properly, the computer may not boot properly. No error message
indicates this failure.
6 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.
2 securing clips
(2 per connector)
1
2
Adding and Replacing Parts
119