Power Supply Problems; Bios Crisis Recovery - Lenovo IdeaCentre D400 Series Hardware Maintenance Manual

Power supply problems

BIOS crisis recovery

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If you suspect a power problem, use the following procedures.
Check/Verify
Check the following for proper installation.
• Power Cord
• Switch connector
• System Board Power Supply connectors
Check the power cord for continuity
Check the power-on switch for continuity.
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.
Chapter 5. Symptom-to-FRU index
FRU/Action
Reseat connectors
Power Cord
Power-on Switch