Chapter 7. Troubleshooting Computer Problems; Troubleshooting; A Startup Problem; Sleep And Hibernation Problems - Lenovo V720-14 User Manual

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Chapter 7. Troubleshooting computer problems

This chapter provides information on what to do if you experience a problem with your computer.

To make sure that your computer has the features that are introduced in the following sections, consult the

online help or the list shipped with your computer.

Print these instructions now and keep it with your computer for reference later.

The Microsoft Windows operating system does not start.

Use the recovery program provided on your computer to identify and troubleshoot the problem. For details,

refer to Chapter 5 "Recover or restore your computer" on page 19.

Print these instructions now and keep it with your computer for reference later.

A critical low-battery error occurs, and the computer immediately turns off.

This indicates that the battery power is getting too low. Connect the ac power adapter to your computer and

plug the other end of the ac power adapter into an electrical outlet.

The computer enters sleep mode immediately after the power-on self-test.

Ensure that:

• The battery is charged.

• The operating temperature is within the acceptable range. Refer to Chapter 6 "Preventing problems"

on page 23.

Print these instructions first.

The screen is blank.

This indicates that the battery power is getting too low. Connect the ac power adapter to your computer and

plug the other end of the ac power adapter into an electrical outlet.

If the problem persists, do the following:

• If you are using the ac power adapter or using the battery pack, and the battery status indicator is on,

press the corresponding shortcut key to increase the screen brightness.

• If the power indicator is blinking, press the power button to resume the computer from sleep mode.

• Check if the display device driver is installed correctly.

• Check if the screen resolution and color quality are correctly set.

• Check if the monitor type is correct.

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