Problems With Drives And Other Storage Devices - Lenovo thinkpad L450 User Manual

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User manual (225 pages)

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Table of Contents

Solution: The battery power is getting low. Connect the ac power adapter to the computer and plug it

into an electrical outlet, or replace the battery with a charged one.

• Problem: The computer display remains blank after you press Fn to return from sleep mode.

Solution: Check whether an external monitor was disconnected or turned off while the computer was in

sleep mode. If you disconnected or turned off the external monitor, connect it or turn it on before resuming

the computer from the sleep mode. When resuming the computer from the sleep mode without attaching

the external monitor or turning it on, and the computer display remains blank, press the display-mode

switching key

to bring up the computer display.

• Problem: The computer does not return from sleep mode, or the system-status indicator blinks slowly

and the computer does not work.

Solution: If the system does not return from sleep mode, it might have entered sleep or hibernation mode

automatically because the battery is depleted. Check the system-status indicator.

– If the system-status indicator blinks slowly, your computer is in sleep mode. Connect the ac power

adapter to the computer; then press Fn.

– If the system-status indicator is off, your computer is in power-off state or hibernation mode. Connect

the ac power adapter to the computer; then press the power button to resume operation.

If the system still does not return from sleep mode, your system might stop responding and you might not

be able to turn off the computer. In this case, you need to reset the computer. If you have not saved your

data, it might be lost. To reset the computer, press and hold the power button for 4 seconds or more. If

the system is still not reset, remove the ac power adapter and the battery.

• Problem: Your computer does not enter sleep or hibernation mode.

Solution: Check whether any option has been selected to disable your computer from entering sleep

or hibernation mode.

If your computer tries to enter sleep mode but the request is rejected, the device attached to the USB

connector might have been disabled. If this occurs, do a hot-unplug-and-plug operation for the USB

device.

• Problem: The battery discharges slightly while the computer is in hibernation mode.

Solution: If the wakeup function is enabled, the computer consumes a small amount of power. This is not

a defect. For details, refer to "Power-saving modes" on page 26.