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Solution: If the system does not return from sleep (standby) mode, it may have entered sleep (standby) or
hibernation mode automatically because the battery is depleted. Check the sleep (standby) indicator.
– If the sleep (standby) indicator is on, your computer is in sleep (standby) mode. Connect the ac
power adapter to the computer; then press Fn.
– If the sleep (standby) indicator is off, your computer is in hibernation mode or power-off state. 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 (standby) mode, your system may stop responding and you
may 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 may 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 (standby) or hibernation mode.
Solution: Check whether any option has been selected to disable your computer from entering sleep
(standby) or hibernation mode.
If your computer tries to enter sleep (standby) mode but the request is rejected, the device in the USB
connector might be disabled. If this occurs, do a hot-unplug-and-plug operation for the USB device.
• Problem: The Fn+F12 key combination does not make the computer enter hibernation mode.
Solution: The computer cannot enter hibernation mode:
– If the hibernation mode is not enabled in Windows XP. To enable it, do as follows:
For Windows XP:
1. Click Start ➙ Control panel.
2. Click Performance and Maintenance.
3. Click Power Options.
4. Click the Hibernate tab.
5. Click the Enable hibernation check box.
6. Click OK.
If you want to be able to enter hibernation mode by pressing Fn+F12, you need to install ThinkPad
PM driver.
• Problem: The battery discharges slightly while the computer is in hibernation mode.
Solution: If the wakeup function is enabled, the computer consumes small amount of power. This is not
a defect. For details, refer to “Power-saving modes” on page 59.
Drives and other storage devices
This section includes three drive problems which are hard disk drive, solid state drive, and optical drive.
Hard disk drive problems
• Problem: The hard disk drive makes a rattling noise intermittently.
Solution: The rattling noise might be heard:
– When the hard disk drive begins or nishes getting access to data.
– When you carry the hard disk drive.
– When you carry your computer.
This is a normal characteristic of a hard disk drive and is not a defect.
• Problem: The hard disk drive does not work.
232 User Guide