Troubleshooting Charts
Other Option Problems
Problem Action
An IBM option that you
just installed does not
work.
Make sure that:
The option is designed for your computer.
The option was installed following the instructions supplied with the option or
this book.
Other installed options or cables are not loose.
There is no I/O address or interrupt level (IRQ) DMA channel conflict. To see
the system resource status, start the ThinkPad Configuration program and
click on the respective device buttons.
If the test program for the option did not find the problem, have the computer and
option serviced.
An IBM option that used
to work no longer works.
Make sure that:
The option is securely connected to your computer.
If the option came with its own test instructions, use those instructions to test
the option.
There is no system resource conflict (see "Resolving System Resource Con-
flicts" in the Online User's Guide).
If these items are correct and the test program did not find the problem, have the
computer and the option serviced.
The serial port does not
work.
Make sure that the serial port is enabled by doing the following:
For Windows 98 and Windows 95:
1. Start the ThinkPad Configuration program.
2. Click Serial Port (
).
3. Select Enable.
4. Click Device Manager.
5. Set up the port in the "Device Manager" window.
6. Click OK.
128 ThinkPad 390X User's Reference
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