Lenovo ThinkStation C20, Hardware Maintenance Manual

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7. Move the jumper from the standard position (pin 1 and pin 2) to the maintenance position (pin 2 and
pin 3).
8. Reinstall any parts and reconnect any cables that have been removed or disconnected.
9. Reinstall the computer cover and reconnect the power cords for the computer and monitor to electrical
outlets. Refer to “Completing the parts replacement” on page 110.
10. Turn on the computer and the monitor. Insert the POST/BIOS update (flash) 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.
11. After the recovery session is completed, the series of beeps will end, and the system will automatically
turn off.
12. Repeat step 2 through step 6.
13. Move the Clear CMOS /Recovery jumper back to the standard position (pin 1 and pin 2).
14. Reinstall any parts and reconnect any cables that have been removed or disconnected.
15. Reinstall the computer cover and reconnect any cables that were disconnected.
16. 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.
Automatic 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.
• Serial Port A Ring Detect : With this feature set to Enabled and an external modem connected to serial
port (COM1), the computer will turn on automatically when a ring is detected on the modem.
• PCI Modem Ring Detect : With this feature set to Enabled , the computer will turn on automatically
when a ring is detected on the internal modem.
• PCI Wake Up: This feature allows PCI cards that support this capability to wake the system.
• Wake Up on Alarm : You can specify a date and time at which the computer will be turned on
automatically. This can be either a single event or a daily event.
• Wake on LAN : If the computer has a properly configured token-ring or Ethernet LAN adapter card that is
Wake on LAN-enabled and there is remote network management software, you can use the Wake on LAN
feature. When you set Wake on LAN to
Enabled , the computer will turn on when it receives a specific
signal from another computer on the local area network (LAN).
System memory speed
The Intel Xeon microprocessor families compatible with this ThinkStation computer feature an integrated
memory controller, which provides the microprocessor with direct access to the system memory. Because
of this design, the system memory speed will be determined by a number of factors, including the
microprocessor model and the type, speed, size (capacity), and number of DIMMs installed. Refer to the
following table for the information on the supported system memory speed for your computer model.
Chapter 11
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Additional service information
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