Lenovo ThinkPad 560E TP 560Z User's Guide that was provided with the system in - Page 133

A Universal Serial Bus (USB) Problem, Problem, Action, Infrared device, Cause and Action, Start

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Title: C79FPMST CreationDate: 06/22/98 12:26:52 Troubleshooting Charts Problem Incorrect data is sent between your computer and a communicating device. You cannot use DMA channels for both the parallel connector and the infrared port. Action 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. If you enable ECP and choose DMA3 (the default value) for the parallel connector, you might be prompted if you want to disable DMA for the infrared port. To use DMA channels for both the parallel and infrared ports, 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 audible device, click on OK. A Universal Serial Bus (USB) Problem Problem A device connected to the USB connector does not work. Cause and Action 1. Make sure that the USB device is connected correctly. 2. Open the "Device Manager" window, and make sure that the USB device setup is correct, and that computer resource assignment and device driver installation are correct. Note: To open the "Device Manager" window, click on Start and move the cursor to Settings and Control Panel. Click on Control Panel and double-click on System. Then click on the Device Manager tab in the "System Properties" window. Refer to "Testing Your Computer" on page 131 and run the diagnostic test for the USB connector. Chapter 4. Solving Computer Problems 119

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Troubleshooting Charts
Problem
Action
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.
You cannot use DMA
channels for both the
parallel connector and the
infrared port.
If you enable ECP and choose DMA3 (the default value) for the parallel
connector, you might be prompted if you want to disable DMA for the infrared
port.
To use DMA channels for both the parallel and infrared ports, 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 audible
device, click on
OK
.
A Universal Serial Bus (USB) Problem
Problem
Cause and Action
A device connected to the
USB connector does not
work.
1. Make sure that the USB device is connected correctly.
2. Open the “Device Manager” window, and make sure that the USB device
setup is correct, and that computer resource assignment and device driver
installation are correct.
Note:
To open the “Device Manager” window, click on
Start
and move the
cursor to
Settings
and
Control Panel
.
Click on
Control Panel
and
double-click on
System
.
Then click on the
Device Manager
tab in
the “System Properties” window.
Refer to “Testing Your Computer” on page
131 and run the diagnostic test for
the USB connector.
Chapter 4.
Solving Computer Problems
119
Title: C79FPMST CreationDate: 06/22/98 12:26:52