Lenovo ThinkPad 380ED ThinkPad 385 User's Guide - Page 180
Option Problems, Problem, Action, Advanced.., Serial Port
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Troubleshooting Option Problems Problem An IBM option that was just installed does not work. An IBM option that used to work no longer works. The serial port does not work. Action Verify that: The option is designed an IBM ThinkPad 385 or 385D computer. You installed option correctly by following the instructions supplied with the option or this book. Other installed options or cables are not loose. No I/O address or interrupt level (IRQ) conflict has occurred. To see the system resource status, start the ThinkPad Features program and click on each device icon. (For some devices, the I/O address or IRQ can be seen when you click on the Advanced.. button.) If the test programs for the option did not find the problem, have the computer and option serviced, or see Appendix A. Verify that: All the option hardware and cable connections are securely connected. If the option came with its own test instructions, use those instructions to test the option. System resource conflicts do not occur (see Appendix A). If the preceding items are correct and the test programs did not find the problem, have the computer and option serviced. Ensure that serial port is enabled and set to COM1, COM2, COM3, or COM4 in the ThinkPad Features program (click on the Serial Port icon). 160 IBM ThinkPad 385 or 385D User's Guide