PC Troubleshooting Guide 15
Keyboard and Mouse (continued )
Symptom Possible cause Solution
The optical sensor uses the
pattern of the surface to
track the position of the
cursor. Reflective surfaces,
grooved surfaces, glass, or
other see-through surfaces
inhibit the ability of the
sensor to track the cursor.
Place the mouse on a mouse pad or white sheet of paper.
Optical mouse does not
track cursor well.
Mouse sensor is dirty. Wipe the light sensor lens on the bottom of the mouse with a
lint-free cloth (not paper).
Mouse cursor moves
too fast.
The wireless mouse moves
the cursor more quickly than
a standard mouse.
Adjust the mouse speed in Windows.
Power
Symptom Possible cause Solution
PC is not securely connected
to an external power source.
Ensure that cables connecting the PC to the external power
source are plugged in properly.
Green power supply light on
back of PC is out.
When the cables connecting the PC to the external power
source are plugged in properly and the wall outlet is
functioning, the green power supply light should be on; if the
light is not on, refer to the Warranty and Support Guide to
contact Support.
Monitor is not connected or
is not on.
Connect the monitor to the PC, plug it in, and turn it on.
Line voltage selection switch
is not in the proper position
for your country/region
(115V/230V).
Set the line voltage selection switch to the correct setting for
your country/region, or refer to the Warranty and Support
Guide to contact Support.
Wall outlet is defective. Test the outlet by connecting a different electrical device to
the outlet.
Wrong memory modules
were used in an upgrade, or
memory modules were
installed in the wrong
location.
Reinstall the old memory to return your PC to its original state.
Refer to the Upgrading and Servicing Guide for instructions.
Hard disk drive is damaged. Press the Help ? button on the keyboard to open the Help
and Support Center, or refer to the Warranty and Support
Guide to contact Support for replacement details.
PC will not turn on or start.
After an upgrade or repair,
the drive power, data, or
power supply cables may
not be properly connected.
Reseat drive power, data, and power supply cables. See the
Upgrading and Servicing Guide for instructions.
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