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Recovering from a POST and BIOS update failure
If the power to your computer is interrupted while the POST and BIOS is being
updated, your computer might not restart correctly. If this happens, perform the
following procedure, which is commonly called Boot-block Recovery.
10. Repeat step 1 through step 4.
11. Move the jumper back to the standard position (pin 1 and pin 2).
12. Reinstall any parts and reconnect any cables that have been removed or
13. Reinstall the computer cover and reconnect power cords and all other external
14. Turn on the computer and remove the disc from the optical drive.
Power management
Power management reduces the power consumption of certain components of the
computer such as the system power supply, processor, hard disk drives, and some
monitors.
Advanced Configuration and Power Interface (ACPI) BIOS
Being an ACPI BIOS system, the operating system is allowed to control the power
management features of the computer and the setting for Advanced Power
Management (APM) BIOS mode is ignored. Not all operating systems support
ACPI BIOS mode.
Automatic Power-On features
The Automatic Power-On features within the Power Management menu allow you
to enable and disable features that turn on the computer automatically.
v RTC resume: You can specify a date and time at which the computer will be
1. Remove all media from the drives and turn off all attached devices and the
computer. Then, disconnect all power cords from electrical outlets and
disconnect all cables that are connected to the computer.
2. Remove the computer cover. See "Removing the computer cover" on page 88.
3. Locate the Clear CMOS /Recovery jumper on the system board. See "Locating
parts on the system board" on page 86.
4. Remove any parts and disconnect any cables that might prevent your access
to the Clear CMOS /Recovery jumper.
5. Move the jumper from the standard position (pin 1 and pin 2) to the
maintenance position (pin 2 and pin 3).
6. Reinstall any parts and reconnect any cables that have been removed or
disconnected.
7. Reinstall the computer cover and reconnect the power cords for the computer
and monitor. See "Completing the parts replacement" on page 114.
8. Turn on the computer and insert the POST and BIOS update (flash update)
disc into the optical drive. The recovery session begins. The recovery session
will take two to three minutes. During this time, you will hear a series of
beeps.
9. After the recovery session is completed, there will be no video, the series of
beeps will end, and the system will automatically turn off.
disconnected.
cables. See "Completing the parts replacement" on page 114.
turned on automatically. This can be either a single event or a daily event.
Chapter 11. Additional service information
181
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