Lenovo ThinkPad i Series 1500 Hardware Maintenance Manual for the ThinkPad 140 - Page 35

Power management features, Standby mode

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14. Select None. 15. Save the changes, and exit the BIOS Utility menu. 16. Power off the computer. 17. Disconnect the AC Adapter. 18. Remove the keyboard. 19. Change DIP switch position (Pin 6) to "Check Pass- word Enabled". 20. Put back the keyboard. Power management features Two power management modes are available in the computer system to reduce power consumption and to prolong battery life. Standby mode: When in standby mode, the fol- lowing occurs: The LCD backlight turns off. The hard disk motor either spins down or stops (controlled by OS). CPU enters stop-grant mode. Events that cause the computer to enter standby mode: Note: These events depend on the Power buttons set- tings (options set to standby mode) in the "Advanced" page of the "Power Management Properties" screen. Standby requested by the Sleep button (Fn+F4) Standby requested by the power button Standby requested by closing the lid. Events that cause the computer to exit standby mode: RTC alarm Power-on switch is operated Any key or Easy Launch button operation The LCD is opened (if the system entered standby mode from closing the lid). Note: This is true if When I close the lid of my portable computer: is set to Standby in the "Advanced" page of the "Power Management Properties" screen Plug-in or plug-out of USB devices A serial or PC Card device signals the modem ring indicator Note: The modem ring wakeup function is effective only on embedded PC Card modem devices. The battery power is at a critical level. 26 ThinkPad i Series 1400/1500 HMM

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14. Select
None
.
15.
Save the changes, and exit the BIOS Utility menu.
16.
Power off the computer.
17.
Disconnect the AC Adapter.
18.
Remove the keyboard.
19.
Change DIP switch position (Pin 6) to
"Check Pass-
word Enabled"
.
20.
Put back the keyboard.
Power management features
Two power management modes are available in the com-
puter system to reduce power consumption and to prolong
battery life.
Standby mode:
When in standby mode, the fol-
lowing occurs:
±
The LCD backlight turns off.
±
The hard disk motor either spins down or stops (con-
trolled by OS).
±
CPU enters stop-grant mode.
Events that cause the computer to enter standby mode:
Note:
These events depend on the
Power buttons
set-
tings (options set to standby mode) in the
"Advanced" page of the "Power Management Prop-
erties" screen.
±
Standby requested by the Sleep button (Fn+F4)
±
Standby requested by the power button
±
Standby requested by closing the lid.
Events that cause the computer to exit standby mode:
±
RTC alarm
±
Power-on switch is operated
±
Any key or Easy Launch button operation
±
The LCD is opened (if the system entered standby
mode from closing the lid).
Note:
This is true if
When I close the lid of my
portable computer:
is set to
Standby
in the
"Advanced" page of the "Power Management
Properties" screen
±
Plug-in or plug-out of USB devices
±
A serial or PC Card device signals the modem ring
indicator
Note:
The modem ring wakeup function is effective
only on embedded PC Card modem devices.
±
The battery power is at a critical level.
26
ThinkPad i Series 1400/1500 HMM