Dell Precision M40 - Manual (Page 7)

3. Turn the computer over, pull out the pull tab, and use the pull tab to remove the fixed optical drive.
Memory Module
Removing the Memory Module Cover
Memory Module Cover
1. Follow the instructions in " Preparing to Work Inside the Computer ."
2. Remove the screw.
3. Disengage the metal tabs at the opposite end of the cover.
Memory Modules
Removing the Memory Modules
1. Remove the memory module cover .
2. To release a memory module from its socket, spread apart the tabs at each side of the module until the module pops up slightly.
NOTICE: To keep the pull tab from catching on the captive screw, turn the computer over before removing the fixed optical drive.
NOTICE: Disconnect the computer and any attached devices from electrical outlets and remove any installed batteries.
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.