upgrading and repairing PCs technicians ... - 400 Bad Request

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Chapter 9—Keyboards, Mice, and Input Devices
Table 9.14 Troubleshooting Mouse and Pointing Device Problems
Continued
Symptom Problem Solution
Remove trackball ball from sensor
and clean as above.
Replace TrackPoint eraserhead
with a new cap.
Mouse pointer IRQ conflict. If mouse is PS/2, be sure no
freezes when other device is using IRQ 12.
another device If mouse is serial, check for
(modem, and so modem on same IRQ as mouse.
on) is used. COM 1/3 share IRQ 4; COM 2/4
share IRQ 3 by default. See
Chapter 6 for information on
avoiding mouse/modem conflicts.
If mouse is bus, check its IRQ
usage and try to find an unused
IRQ for bus card.
Use Windows Device Manager if
available to find IRQ information.
Mouse won’t work Defective mouse. Replace the original mouse with
at all. a known-working similar spare. If
it works, replace the original
mouse for good.
Defective port. Any mouse plugged in to the
port won’t work. First, check to
see whether port is disabled. If
the port is not disabled, use addon
port card or replace motherboard.
Disabled COM, USB, Check BIOS or motherboard
or PS/2 port. jumpers and enable if IRQ used
by port isn’t already in use.
Radio-controlled Check battery in mouse; replace
mouse has a dead
battery.
if dead or weak.
Wrong channel set on Mouse and receiver must be set
mouse or receiver. to same channel; adjust channels
on both devices to solve interference
problems.
Infra-red mouse can’t Check line-of-site issues for IR
“see” IR receiver. mouse and receiver.
Mouse works as Mouse designed for Most “bundled” mice are
PS/2, but not as PS/2 port only. designed for the PS/2 port only.
serial. Retail mice are designed to be
used with adapters. Get a mouse
built for the serial port.