514699
31
Zoom out
Zoom in
Previous page
1/35
Next page
Chapter 4. Troubleshooting
27
The computer enters sleep
mode immediately after
Power-on self-test (POST).
Make sure that:
- The battery is charged.
- The operating temperature is within the acceptable range. See
“Chapter 2. Use and care Information” of Lenovo Safety and General
Information Guide.
Note: If the battery is charged and the temperature is within range, have the computer serviced.
The computer does not
return from sleep mode and
the computer does not work.
If your computer is in sleep mode, connect the AC adapter
to the computer, then press any key or the power button.
If the system still does not return from sleep mode, your
system has stopped responding, and you cannot turn off the
computer; reset the computer. Unsaved data may be lost. To
reset the computer, press and hold the power button for 4
seconds or more. If the computer is still not reset, remove
the AC adapter.
Computer screen problems
The screen is blank. Do the following:
- If you are using the AC adapter, or using the battery, and the
battery status indicator is on, press F12 to make the screen brighter.
- If the power indicator is in blinking, press the power button to
resume from the sleep mode.
- If the problem persists, follow the solution in the following
problem “The screen is unreadable or distorted.”
- Press F9 to confirm whether the backlight for the LCD screen has
been turned off.
The screen is unreadable or
distorted.
Make sure that:
- The display device driver is installed correctly.
- The screen resolution and color quality are correctly set.
- The monitor type is correct.
Incorrect characters appear
on the screen.
Did you install the operating system or programs correctly?
If they are installed and configured correctly, have the
computer serviced.
Sound problems
No sound can be heard from
the speaker even when the
volume is turned up.
Make sure that:
- The Mute function is off.
- The headphone jack is not used.
- Speakers are selected as the playback device.
Battery problems
Your computer shuts down
before the battery status
indicator shows empty.
-or-
Your computer operates after
the battery status indicator
shows empty.
Discharge and recharge the battery.
31


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Lenovo IdeaPad Z400 at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Lenovo IdeaPad Z400 in the language / languages: English as an attachment in your email.

The manual is 4,51 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info