2.While the machine is turned off, remove all power sources from the computer (battery and ac power). Hold down the power button for 10 seconds. Plug in the ac power while keeping the battery out of the computer. If the computer does not turn back on, continue to step 3.

Note: Once the computer starts up and enters the Windows environment, use the proper shutdown procedure to turn the computer off. Once the machine is off, reattach the battery and restart the computer. If the computer does not start with the battery reattached, remove the battery and again start with step 2. If the computer starts with ac power but does not start when the battery is attached, call the Customer Support Center for support.

3.While the machine is off, remove all sources of power from the machine (battery and ac power). Remove all external devices that are attached to your computer (keyboard, mouse, printer, scanner, and so on.). Repeat step 2. If step 2 is unsuccessful, continue to step 4.

Note: The following steps involve removing static sensitive components from your computer. Please make sure that you are properly grounded and remove all sources of power attached to the computer. If you are uncomfortable or unsure about removing components please call the Customer Support Center for assistance.

4.While the computer is off, remove all sources of power and external hardware. Remove any non-original memory module added to your computer. After removing the extra memory module and reseating the original memory module, repeat step 2. If the computer still does not turn on, consult the user's reference guide for other customer-replaceable components that are attached to your computer

If the computer still does not start up, call the Customer Support Center and a Customer Support Specialist will assist you.

Spills on the keyboard

With a mobile computer, there are increased chances of spilling liquids on the keyboard. Because most liquids conduct electricity, liquid spilled on the keyboard could create numerous short circuits, potentially causing irreparable damage to your computer.

If you spill something on your computer:

Attention: Be sure that no liquid creates a short circuit between you and the ac power adapter (if in use). Although you might lose some data or work by turning off the computer immediately, leaving the computer on might make your computer unusable.

1.Carefully unplug the ac power adapter immediately.

2.Turn off the computer immediately. If the computer does not turn off, remove the battery. The more quickly you stop the current from passing through the computer the more likely you will reduce damage from short circuits.

3.Wait until you are certain that all the liquid is dry before turning on your computer.

Note: If you want to replace your keyboard, you can purchase a new one.

Error messages

Message: 0176: System Security - The System has been tampered with.

Solution: This message is displayed if you remove the Security Chip and reinstall it, or install a new one. To clear the error, enter the ThinkPad Setup. If this does not solve the problem, have the computer serviced.

Message: 0177: Bad SVP data, stop POST task.

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Lenovo 23539KU manual Spills on the keyboard, Error messages, If you spill something on your computer