Dell 1950 Troubleshooting a Serial I/O Device , Troubleshooting a USB Device

Troubleshooting Your System 97
Troubleshooting a Serial I/O Device
Problem
• Device connected to the serial port is not operating properly.
Action
1 Turn of f the system and any peripheral devices connected to the serial port.
2 Swap the serial interface cable with a working cable, and turn on the system and the ser ial device.
If the problem is resolved , replace the interface cable.
3 Turn of f the system and the serial device, and swap the device with a comparable device.
4 Turn on the system and the seria l device.
If the problem is resolved , replace the serial device. See "Getting Help" on page 125.
If the problem persists, see "Getting Help" on page 125.
Troubleshooting a USB Device
Problem
• System message indicates a problem with a USB device.
• Device connected to a USB port is not operating properly.
Action
1 Enter the System Setup program, a nd ensure that the U SB ports are en abled. See "Using the System Setu p
Program" on page 31.
2 Turn of f the system and any USB devices.
3 Disconnect the USB devices, and connect the malfunction ing device to the other USB connector.
4 Turn on the system and the reco nnected device.
If the problem is resolved, the USB connector might be defective. See "Getting Help" on page 125.
5 If possible, swap the interface cable with a working cable.
If the problem is resolved, replace the interface cable. See "Getting Help" on page 125.
6 Turn of f the system and the USB device, and swap the device with a comparable device .
7 Turn on the system and the USB device.
If the problem is resolved , replace the USB device. See "Gettin g Help" on page 125.
If the problem persists, see "Getting Help" on page 125.