Lenovo D400 Desktop IdeaCentre - Manual (Page 31)

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Chapter 5. Symptom-to-FRU index
Power supply problems
If you suspect a power problem, use the following procedures.
BIOS crisis recovery
When the home center’s BIOS fails or image crashes, the system status
indicator blinks blue and purple. You can use the bootable USB flash device to
recover the system BIOS.
To recover a damaged BIOS:
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.
4. System BIOS recovery is initiated. The system status indicator blinks blue
and purple.
Check/Verify FRU/Action
Check the following for proper installation.
•
Power Cord
• Switch connector
• System Board Power Supply connectors
Reseat connectors
Check the power cord for continuity Power Cord
Check the power-on switch for continuity. Power-on Switch