Troubleshooting Charts
Infrared Communication Problems
Problem Action
You computer cannot
communicate with other
devices using the
infrared port.
Make sure that:
The communication speeds are the same.
The infrared ports are clean.
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 infrared ports are enabled.
The other computer's infrared port complies to the same standard as yours.
You are not operating under direct sunlight.
The infrared ports are directly facing each other.
Communication can be affected by the light from the display on the computer. To
avoid this, open the display to a wide angle.
The same communications application has to be running on your computer and
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 com-
municating device.
You are not operating under direct sunlight.
No fluorescent lamps are near your computer or the communicating device.
120 ThinkPad 390X User's Reference
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