Dell M2400 Service Manual - Page 14

Power Problems, Sound and Speaker Problems

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If you experience other memory problems - • Reseat the memory modules (see Memory) to ensure that your computer is successfully communicating with the memory. • Ensure that you are following the memory installation guidelines (see Replacing a Memory Module). • Ensure that the memory you are using is supported by your computer. For more information about the type of memory supported by your computer, see the Setup and Quick Reference Guide for your computer atsupport.dell.com. • Run the Dell Diagnostics (see Dell Diagnostics). Power Problems CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer. If the power light is blue and the computer is not responding - See Diagnostic Lights. If the power light is off - The computer is either turned off or is not receiving power. • Reseat the power cable in the power connector on the back of the computer and the electrical outlet. • Bypass power strips, power extension cables, and other power protection devices to verify that the computer turns on properly. • Ensure that any power strips being used are plugged into an electrical outlet and are turned on. • Ensure that the electrical outlet is working by testing it with another device, such as a lamp. Eliminate interference - Some possible causes of interference are: • Power, keyboard, and mouse extension cables • Too many devices connected to the same power strip • Multiple power strips connected to the same electrical outlet Sound and Speaker Problems CAUTION: Before you begin any of the procedures in this section, follow the safety instructions that shipped with your computer. No sound from speakers NOTE: The volume control in MP3 and other media players may override the Windows volume setting. Always check to ensure that the volume on the media player(s) has not been turned down or off. Adjust the Windows volume control - Click or double-click the speaker icon in the lower-right corner of your screen. Ensure that the volume is turned up and that the sound is not muted.

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If you experience other memory problems —
•
Reseat the memory modules (see
Memory
) to ensure that your computer is successfully
communicating with the memory.
•
Ensure that you are following the memory installation guidelines (see
Replacing a Memory
Module
).
•
Ensure that the memory you are using is supported by your computer. For more information
about the type of memory supported by your computer, see the
Setup and Quick Reference
Guide
for your computer at
support.dell.com
.
•
Run the Dell Diagnostics (see
Dell Diagnostics
).
Power Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
If the power light is blue and the computer is not responding —
See
Diagnostic Lights
.
If the power light is off —
The computer is either turned off or is not receiving power.
•
Reseat the power cable in the power connector on the back of the computer and the electrical
outlet.
•
Bypass power strips, power extension cables, and other power protection devices to verify that
the computer turns on properly.
•
Ensure that any power strips being used are plugged into an electrical outlet and are turned
on.
•
Ensure that the electrical outlet is working by testing it with another device, such as a lamp.
Eliminate interference —
Some possible causes of interference are:
•
Power, keyboard, and mouse extension cables
•
Too many devices connected to the same power strip
•
Multiple power strips connected to the same electrical outlet
Sound and Speaker Problems
CAUTION:
Before you begin any of the procedures in this section, follow the safety
instructions that shipped with your computer.
No sound from speakers
NOTE:
The volume control in MP3 and other media players may override the Windows volume
setting. Always check to ensure that the volume on the media player(s) has not been turned
down or off.
Adjust the Windows volume control —
Click or double-click the speaker icon in the lower-right
corner of your screen. Ensure that the volume is turned up and that the sound is not muted.