Lenovo D400 Desktop IdeaCentre - Manual (Page 22)

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Hardware Maintenance Manual
Checkout procedure
The checkout procedure is the sequence of tasks that you should follow to
diagnose a problem in the home center.
Before performing the checkout procedure for diagnosing hardware problems,
review the following information:
• Read the safety information. Go to “Safety information”.
• The diagnostic program provides the primary methods of testing the major
components on the home center, such as the hard disk drives, fan, memory
module, processor and system temperature, voltage, and hard disk drive
backplane. If you are not sure whether a problem is caused by the hardware
or by the software, you can use the diagnostic program to confirm that the
hardware is working correctly.
Diagnostic process
You can run the diagnostic program to determine a problem with the home
center.
To run the diagnostic program, perform the following steps:
1. Power-off the home center and all external devices.
2. Plug the bootable USB flash device to any USB connector on the rear of the
home center.
3. Press the Power button to turn on the home center. The HDD access
indicator blinks blue.
4. After 3 seconds, press and release the recovery/reset button with the paper
clip end. The system status indicator blinks red.
5. After the HDD 1 status indicator lights purple, scan the serial number.
6. When the HDD 3 status indicator lights purple, scan the employee number.
The diagnostic process will now start in the following sequence:
a. Onboard flash check
b. HDD disk account check
c. DIMM size check (1024 or 2048 MB)
d. Fan speed check
e. System board voltage
f. Backplane temperature
Note
Run the diagnostic program from the USB flash device.