Dell Inspiron 1721 (Mid 2007) - Manual (Page 45)

1. Follow the procedures in Before You Begin .
2. Turn the computer over.
3. Loosen the captive screw on the memory module cover, then remove the cover and set it aside.
4. Use your fingertips to carefully spread apart the securing clips on each end of the memory module connector until the memory module pops up.
5. Remove the memory module from the connector.
Replacing a Memory Module
DIMM A Memory Module
The DIMM A memory module is located under the keyboard.
1. Follow the procedures in Before You Begin .
2. Align the notch in the memory module edge connector with the tab in the connector slot.
3. Slide the memory module firmly into the slot at a 45-degree angle, and rotate the module down until it clicks into place. If you do not feel the click,
remove the module and reinstall it.
1 memory module cover 2 captive screw
NOTICE: To prevent damage to the memory module connector, do not use tools to spread the memory module securing clips.
1 securing clips (2) 2 memory module
CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.
NOTE: If the memory module is not installed properly, the computer may not boot. No error message indicates this failure.