Lenovo 23539KU Beep errors, Memory problems, Networking, Ethernet problems, Problem Solution

–Use either the Rescue and Recovery workspace or the recovery discs to restore the system to the factory state. For details about restoring the system to the factory state, see “Creating and using recovery media” on page .

If the problem persists, have the computer serviced.

•Problem: My screen goes blank while the computer is on.

Solution: Your screen saver or power management may be enabled. Do either of the following:

–Touch the TrackPoint or the touch pad, or press a key to exit the screen saver.

–Press the power button to resume from sleep or hibernation.

Beep errors

Table 8. Beep errors

Problem	Solution
One short beep, pause, three short beeps, pause, three	Make sure that memory modules are installed correctly. If
more short beeps, and one short beep	they are, and you still hear the beeps, have the computer
	serviced.
One long and two short beeps	The video function has a problem. Have the computer
	serviced.
Four cycles of four short beeps	The Security Chip has a problem. Have the computer
	serviced.
Five beeps	The system board has a problem. Have the computer
	serviced.

Memory problems

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

If your memory is not operating properly, check the following items:

1.Verify that the memory is installed and seated correctly in your computer.

It may be necessary to remove all added memories to test the computer with only the factory-installed memories, and then reinstall the memory one at a time to ensure a proper connection. For the procedures to remove and reinstall a memory, refer to “Replacing a memory module” on page 69.

2.Check for error messages during startup.

Follow the appropriate corrective actions for Power-on self-test (POST) . See “Error messages” on page 138.

3.Verify that the latest UEFI for your model has been installed.

4.Verify the proper memory configuration and compatibility including the maximum memory size and the memory speed.

For details, refer to the instructions in “Replacing a memory module” on page 69.

5.Run diagnostic programs. See “Diagnosing problems” on page 137.

Networking

The following are the most common networking problems:

Ethernet problems

• Problem: Your computer cannot connect to the network.

142User Guide