IBM ThinkPad 380XD, User Manual, Page: 170 / 222

Troubleshooting Charts
Infrared Communication Problems
Problem Action
Your computer cannot
communicate with other
devices using the infrared
port. Make sure that:
The communication speeds are the same.
The infrared ports are clean and do not have any spots.
No objects are between the computer and the communicating device.
The distance and angle between your computer and the device is within the
set range.
The other computer is the same model as yours.
You are not operating under direct sunlight.
The infrared port is not directly facing the other communicating port.
Communication is not impeded by the light from computer's LCD. To avoid
this, open the LCD to a wide angle.
The communication application running on your computer is the same as
that running on the other computer. Refer to the application manuals for
more information.
Incorrect data is sent
between your computer
and a communicating
device. Make sure that:
The distance and angle between your computer and the device is within the
set range.
The communication speeds are the same.
There are no other devices that radiate infrared rays, such as
remote-controlled devices or wireless headphones, near your computer or
the communicating device.
You are not operating under direct sunlight.
No fluorescent lamps are near your computer or the communicating device.
How can I use DMA
channels for both parallel
port and infrared port? If you enable ECP and choose DMA3 (default value) for the parallel port, you
might be prompted if you want to disable DMA for the infrared port. To use
DMA channels for both parallel and infrared port, do the following:
1. Click on OK to disable DMA for the infrared port.
2. Close a parallel port panel.
3. Click on the Infrared device button to open the infrared panel.
4. Choose DMA0 or DMA1 for infrared port on the panel.
5. If you see the panel prompting if you want to disable DMA for an audio
device, click on OK.
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IBM ThinkPad 380XD/385XD User's Guide