Lenovo 7099U1U, Hardware Maintenance Manual, Page: 42 / 224

Note: If you encounter failures that prevent you from gaining access to the Rescue and Recovery workspace,
you can run the PC-Doctor for Rescue and Recovery program after using a rescue medium to recover the
computer from failures and gaining access to the Rescue and Recovery workspace.
PC-Doctor for DOS
You can also download the latest version of the PC-Doctor for DOS diagnostic program from
http://www.lenovo.com/support. The PC-Doctor for DOS diagnostic program runs independently of the
Windows operating system. Use the PC-Doctor for DOS diagnostic program if you are unable to start the
Windows operating system. You can run the PC-Doctor for DOS diagnostic program from a diagnostic
disc that you created.
Creating a diagnostic disc
This section provides instructions on how to create a diagnostic disc.
To create a diagnostic disc, do the following:
1. Download a self-starting bootable disc image (known as an ISO image) of the diagnostic program
from:http://www.lenovo.com/support
2. Use any disc burning software to create a diagnostic disc with the ISO image.
Running the diagnostic program from the diagnostic disc
This section provides instructions on how to run the diagnostic program from the diagnostic disc that
you created.
To run the diagnostic program from the diagnostic disc that you created, do the following:
1. Make sure your computer is turned off.
2. Repeatedly press and release the F12 key when turning on the computer. When the Startup Device
Menu opens, release the F12 key.
3. Insert the diagnostic disc into the optical drive.
4. Select the optical drive with the diagnostic disc as the startup device and press Enter. The diagnostic
program opens.
5. Follow the instructions on the screen to run the desired diagnostic test. For additional help, press the
F1 key.
6. Remove the diagnostic disc from the optical drive after completing the diagnostic test.
Navigating through the diagnostic programs
Use the cursor movement keys to navigate within the menus.
• The Enter key is used to select a menu item.
• The Esc key is used to back up to the previous menu.
• For online help, select F1.
Running tests
There are four ways to run the diagnostic tests.
• Using the cursor movement keys, highlight Run Normal Test or Run Quick Test from the Diagnostics
menu and then press Enter. This automatically runs a pre-defined group of tests from each test category.
Run Normal Test runs a more extensive set of tests than Run Quick Test does and takes longer to
complete.
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ThinkCentre Hardware Maintenance Manual