Dell XPS M1530 (M1530, Late 2007) - Manual (Page 19)

Memory 19
3 Use your fingertips to carefully spread apart the securing clips on each end
of the memory module connector until the module pops up.
4 Remove the module from the connector.
Replacing the DIMM A 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 Align the notch in the module edge connector with the tab in the
connector slot.
2 Slide the module firmly into the slot at a 45-degree angle, and press the
module down until it clicks into place. If you do not feel the click, remove
the module and reinstall it.
NOTE: If the memory module is not installed properly, the computer may not boot.
No error message indicates this failure.
1 upper memory module connector 2 securing clip (2)
3 memory module (DIMM A)
2 3
1