Dell Inspiron 535s (Early 2009) - Manual (Page 28)

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Solving Problems
If you encounter interference that hinders
reception on your computer — An unwanted
signal is creating interference by interrupting or
blocking other signals. Some possible causes of
interference are:
Power, keyboard, and mouse extension •
cables.
Too many devices connected to a power
•
strip.
Multiple power strips connected to the same
•
electrical outlet.
Memory Problems
If you receive an insufficient memory
message —
Save and close any open files and exit any •
open programs you are not using to see if
that resolves the problem.
See the software documentation for
•
minimum memory requirements. If
necessary, install additional memory
(see the Service Manual on the Dell Support
website at support.dell.com).
Reseat the memory modules (see the
•
Service Manual on the Dell Support website
at support.dell.com) to ensure that your
computer is successfully communicating
with the memory.