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If the problem is resolved, you must replace the interface cable (see "Getting Help").
3. Turn off the system and the serial device, and swap the device with a comparable device.
4. Turn on the system and the serial device.
If the problem is resolved, you must replace the serial device (see "Getting Help").
If the problem persists, see "Getting Help."
Troubleshooting a Parallel Printer
Problem
l Parallel printer is not operating properly
l Parallel printer interface cable
Action
1. Turn off the system and the parallel printer.
2. Swap the parallel printer interface cable with a known working cable, and turn on the system and the printer.
3. Attempt a print operation.
If the print operation is successful, you must replace the interface cable (see "Getting Help").
4. Run the printer's self-test.
If the self-test fails, the printer is malfunctioning (see "Getting Help").
Troubleshooting a USB Device
Problem
l System message indicates a problem with a USB device
l Device connected to a USB port is not operating properly
l USB device interface cable
Action
1. Enter the System Setup program, and ensure that the USB ports are enabled (see "Using the System Setup Program" in your User's Guide).
2. Turn off the system and any USB devices.
3. Disconnect the USB devices, and connect the malfunctioning device to the other USB connector.
4. Turn on the system and the reconnected device.
If the problem is resolved, the USB connector might be defective (see "Getting Help").
5. If possible, swap the interface cable with a known working cable.
If the problem is resolved, you must replace the interface cable (see "Getting Help").
6. Turn off the system and the USB device, and swap the device with a comparable device.
7. Turn on the system and the USB device.