Dell Inspiron 1420 (Mid 2007) - Manual (Page 139)

Adding and Replacing Parts
139
Memory
CAUTION:
Before you begin any of the procedures in this section, follow the
safety instructions in the Product Information Guide.
You can increase your computer memory by installing memory modules on
the system board. See "Specifications" on page 167 for information on the
memory supported by your computer. Install only memory modules that are
intended for your computer.
NOTE:
Memory modules purchased from Dell are covered under your computer
warranty.
Your computer has two user-accessible SODIMM sockets, DIMM A and
DIMM B accessed from the bottom of the computer.
NOTICE:
If your computer has only one memory module, install the memory module
in the connector labeled “DIMMA.”
NOTICE:
If you need to install memory modules in two connectors, install a
memory module in the connector labeled “DIMMA” before you install a module in
the connector labeled “DIMMB.”
Removing the Memory Module
NOTICE:
To avoid electrostatic discharge, ground yourself by using a wrist
grounding strap or by periodically touching an unpainted metal surface (such as a
connector on the back of the computer).
1 Follow the procedures in "Before You Begin" on page 129.
2 Turn the computer over.
3 Loosen the captive screws from the memory module cover.
4 Lift the memory module cover and set it aside.