Lenovo ThinkPad T420si Hardware Maintenance Manual page 43

Note: PC-Doctor for DOS is available at the following Web site: http://www.lenovo.com/supportTo create
the PC-Doctor diagnostic CD, follow the instructions on the Web site.
For some possible configurations of the computer, PC-Doctor might not run correctly. To avoid this problem,
you need to initialize the computer setup by use of the ThinkPad Setup before you run PC-Doctor.
To enter ThinkPad Setup, do as follows:
1. Turn on the computer.
2. When the ThinkPad logo comes up, immediately press F1 to enter the ThinkPad Setup.
Note: If a supervisor password has been set by the customer, ThinkPad Setup menu appears after the
password is entered. You can start the ThinkPad Setup by pressing Enter instead of entering the supervisor
password; however, you cannot change the parameters that are protected by the supervisor password.
On the ThinkPad Setup screen, press F9, Enter, F10, and then Enter.
Note: When you initialize the computer configuration, some devices are disabled, such as the serial port. If
you test one of these devices, you will need to enable it by using Configuration utility for DOS. The utility is
available on the following Web site: http://www.lenovo.com/support
PC-Doctor cannot be used to test a device that is in the docking station, even if the computer supports the
docking station. To test a USB device, connect it to the USB connector of the computer.
Testing the computer
Note: The PC-Doctor for DOS CD-R/CD-RW disc supports only test of internal optical disc drives (CD-RW,
CD-RW/DVD Combo, and DVD Multi drives) on ThinkPad computers. It does not support test of any optical
disc drives connected through USB devices, PC cards, CardBus cards, or similar. The USB limitation only
applies to testing of the device. Using a bootable PC-Doctor for DOS CD/DVD, the system can be started
from a USB attached optical drive.
To run the test, do as follows:
1. Turn off the computer.
2. Make sure that the optical drive that is supported as a startup device is installed to the computer.
3. Turn on the computer. If the computer cannot be powered on, go to "Power system checkout" on page
42, and check the power sources. If an error code appears, go to "Symptom-to-FRU index" on page 52.
4. When the ThinkPad logo comes up, immediately press F12 to enter the Boot Menu.
5. Insert the PC-Doctor CD into the optical drive.
6. Press cursor keys to select ATAPI CDx (x: 0, 1, ...) and then press Enter.
7. Follow the instructions on the screen.
8. The main panel of PC-Doctor appears.
9. Select Diagnostics with the arrow keys, and press Enter.
Note: You can select an item not only with the arrow keys, but also with the TrackPoint
Instead of pressing Enter, click the left button.
A pull-down menu appears. (Its exact form depends on the model.)
Note: PC-Doctor menu does not mean the formal support device list. Some unsupported device names
may appear in the PC-Doctor menu.
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pointer.
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Chapter 3 General checkout
37