Lenovo ThinkCentre M55, Hardware Maintenance Manual

Page: 48 / 388

If the computer does not have a CD burner or you do not have Internet access, see “Creating diagnostic
diskettes” on page 42.
Creating diagnostic diskettes
To create diagnostic diskettes, download the PC-Doctor for DOS diagnostic program from
http://www.lenovo.com/support/ onto two blank, formatted diskettes.
If you do not have Internet access, create the diagnostic diskettes using the following procedure:
Note: You will need a diskette drive on the computer or a USB diskette drive to complete this procedure.
1. Shut down the operating system and turn off the computer.
2. If you are using a USB diskette drive, plug it into the computer.
3. Repeatedly press and release the F11 key as you turn on the computer.
4. When you hear beeps or see a logo screen, stop pressing the F11 key. The Rescue and Recovery
workspace opens.
Note: For some models, press the Esc key to enter Rescue and Recovery.
5. From the Rescue and Recovery workspace, select Create diagnostic disks .
6. Follow the instructions on the screen.
7. When prompted, insert a blank, formatted diskette into the diskette drive and continue to follow the
instructions on the screen.
8. When the operation is complete, remove the diskette and click Quit .
9. Insert another blank, formatted diskette into the diskette drive and continue to follow the instructions on
the screen.
10. When the operation is complete, remove the diskette and click Quit .
Running diagnostics from the CD or diskettes
1. If you are running diagnostics from diskettes using a USB diskette drive, plug in the USB drive.
Note: The optical drive or diskette drive must be selected in the startup sequence. See “Selecting a
startup device” on page 48 for instructions on how to select the startup device.
2. Insert the CD or diskette.
3. Restart the computer.
4. When the diagnostics program opens, follow the instructions on the screen.
Note: If you are running diagnostics from a diskette, when prompted, remove the first diskette and
insert the second diskette.
5. Select the diagnostic test you want to run. Press the F1 key for additional help.
6. Remove the CD or diskette when the program finishes.
Running diagnostics from the Rescue and Recovery workspace
If you do not have a diagnostic CD image or diagnostic diskette, you can run the PC-Doctor for DOS
diagnostic program from the Rescue and Recovery workspace. To run diagnostics from the Rescue and
Recovery workspace, use the following procedure:
1. Shut down the operating system and turn off the computer.
2. Repeatedly press and release the F11 key as you turn on the computer.
3. When you hear beeps or see a logo screen, stop pressing the F11 key. The Rescue and Recovery
workspace opens.
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Hardware Maintenance Manual