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Modem Board Checkout
Do the following to isolate the problem to the system
internal modem:
1. Boot from and start PC-Doctor DOS. (See “PC-Doctor
DOS System Diagnostics” on page 48 for details.)
2. Select Diagnostics.
3. Select Other Devices.
4. Run Modem Loopback Test and Modem
Dialtone/DTMF Test.
5. Follow the instructions in the message window.
6. If the test detects a modem problem, replace the
modem card.
ThinkPad 390X / i 1700 HMM
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