HP Armada 4200 Armada 4100 and 4200 Families of Personal Computers Maintenance - Page 50

Solving Hardware Installation Problems, Solving Infrared Connection Problems, Table 2-20

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Solving Hardware Installation Problems Some common causes and solutions for hardware installation problems are listed in the following table. Problem A new device is not recognized as part of the computer system. Table 2-20 Solving Hardware Installation Problems Probable Cause Solutions(s) Cable(s) of new external Ensure that all cables are properly and device are loose or securely connected. power cables are unplugged. Power switch of new external device is not turned on. Turn off the computer, turn on the external device, then turn on the computer to integrate the device with the computer system. Device is not seated properly. Turn off the computer and reinsert the device. Solving Infrared Connection Problems Some common causes and solutions for infrared connection problems are listed in the following table. Table 2-21 Solving Infrared Connection Problems Problem Cause Solution(s) Cannot link with another computer. Interrupt request (IRQ) conflict. Check IRQ assignments for conflicts and reassign as necessary. Baud rate conflict. Select the same baud rate for both computers. Data transmission problem. Direct sunlight, fluorescent Remove the interfering light sources. light, or flashing incandescent light is close to the infrared connections. Interference from other wireless devices. Keep remote control units such as wireless headphones and other audio devices away from the infrared connections Physical obstruction. Do not place objects between the two units that will interfere with a line-of-sight data transmission. Movement. Do not move either unit during data transmission. Orientation. Adjust devices so that they point within 30 degrees of each other. Distance. Verify that devices are not more than 3 feet (1 m) apart. 2-22 Troubleshooting

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2-22
Troubleshooting
Solving Hardware Installation Problems
Some common causes and solutions for hardware installation problems are listed in the
following table.
Table 2-20
Solving Hardware Installation Problems
Problem
Probable Cause
Solutions(s)
A new device is not
recognized as part of
the computer system.
Cable(s) of new external
device are loose or
power cables are unplugged.
Ensure that all cables are properly and
securely connected.
Power switch of new external
device is not turned on.
Turn off the computer, turn on the external
device, then turn on the computer to
integrate the device with the computer
system.
Device is not seated properly.
Turn off the computer and reinsert the
device.
Solving Infrared Connection Problems
Some common causes and solutions for infrared connection problems are listed in the
following table.
Table 2-21
Solving Infrared Connection Problems
Problem
Cause
Solution(s)
Cannot link with another
computer.
Interrupt request (IRQ) conflict.
Check IRQ assignments for conflicts and
reassign as necessary.
Baud rate conflict.
Select the same baud rate for both
computers.
Data transmission problem.
Direct sunlight, fluorescent
light, or flashing incandescent
light is close to the infrared
connections.
Remove the interfering light sources.
Interference from other
wireless devices.
Keep remote control units such as wireless
headphones and other audio devices away
from the infrared connections
Physical obstruction.
Do not place objects between the two units
that will interfere with a line-of-sight data
transmission.
Movement.
Do not move either unit during data
transmission.
Orientation.
Adjust devices so that they point within
30 degrees of each other.
Distance.
Verify that devices are not more than
3 feet (1 m) apart.