• DIMM. Make sure to use supported memory.

1. Load Setup Defaults in the BIOS Setup Utility
2. Backup battery
3. System board

1. Load Setup Defaults in the BIOS Setup Utility
2. Backup battery
3. System board

1. Reseat DIMM. If the problem still exists, replace the DIMM
2. System board

1. Reseat DIMM. If the problem still exists, replace the DIMM
   
2. System board

1. Load Setup Defaults in the BIOS Setup Utility
2. Backup battery
3. System board

1. Restore the system configuration to what it was before the computer entered hibernation mode
   
2. If memory size has been changed, re-create the hibernation file

1. Fan
2. Thermal grease
3. System board

• System board

• The Predesktop Area on the HD is corrupted, restore it from a recovery CD

Check the status of device which you want to boot from.

Device not found

1. The device you want to boot from
2. System board
   

Device Error

1. The device you want to boot from
   
2. System board

No valid operating system

1. Check that the operating system has no failure and is installed correctly.
   
2. Reinstall the operating system

Excluded from boot order

• Enter the BIOS Setup Utility and add the device in boot order.