6-4 Dell PowerEdge 4200 Systems Installation and Troubleshooting GuideTroubleshooting a Parallel PrinterIf the procedure in the preceding subsection, “Trouble-shooting the Basic I/O Functions,” indicates that theproblem is with a parallel printer, follow these steps:1. Turn off the parallel printer and computer.2. Swap the parallel printer interface cable with aknown working cable.3. Turn on the parallel printer and computer.4. Attempt a print operation on the parallel printer.Does the print operation complete successfully?Yes. The interface cable must be replaced. See Chap-ter 11, “Getting Help,” for instructions on obtainingtechnical assistance.No. Go to step 5.5. Run the parallel printer’s self-test.Does the self-test complete successfully?Yes. Go to step 6.No. The printer is probably defective. If the printerwas purchased from Dell, see Chapter 11, “GettingHelp,” for instructions on obtaining technicalassistance.6. Attempt another print operation on the parallelprinter.Does the print operation complete successfully?Yes. You have fixed the problem.No. See Chapter 11, “Getting Help,” for instructionson obtaining technical assistance.Troubleshooting a Serial I/O DeviceIf the procedure in “Troubleshooting the Basic I/O Func-tions,” found earlier in this chapter, indicates that theproblem is with a device connected to one of the serialports, follow these steps:1. Turn off the computer and any peripheral devicesconnected to the serial ports.Are two serial devices connected to the computer?Yes. Go to step 2.No. Go to step 4.2. Disconnect the devices from serial ports 1 and 2,and connect the malfunctioning serial device tothe opposite port.3. Turn on the computer and the reconnected serialdevice.Is the problem resolved?Yes. The serial port may be defective. See Chap-ter 11, “Getting Help,” for instructions on obtainingtechnical assistance.No. Go to step 4.4. Swap the interface cable (that connects the deviceto the serial port) with a known working cable.Is the problem resolved?Yes. The interface cable must be replaced. See Chap-ter 11, “Getting Help,” for instructions on obtainingtechnical assistance.No. Go to step 5.5. Turn off the computer and the serial device, andswap the device with a comparable workingdevice.For example, if the serial mouse has a problem, swapit with a serial mouse that you know is workingproperly.6. Turn on the computer and the serial device.Is the problem resolved?Yes. The serial device must be replaced. See Chap-ter 11, “Getting Help,” for instructions on obtainingtechnical assistance.No. See Chapter 11, “Getting Help,” for instructionson obtaining technical assistance.
