Make sure all cables are securely connected to devices, such as between your VAIO computer and the AC adapter; the AC adapter and the power cord; and the power cord and an AC outlet. See Connecting a Power Source.

If you plug the power cord of your VAIO computer into a power strip with a switch, make sure the switch is turned on and the power cord of the power strip is securely plugged into an AC outlet.

If you do not turn off your VAIO computer through the normal procedure, the power controller may be suspended due to a program error.

Disconnect all cables and peripheral devices, such as the power cord and the USB device, and push and hold the battery off button for three to five seconds with a thin, straight object (such as a paper clip).

Wait about five minutes and then put all cables and devices back in place and turn on the computer again.

Before using your VAIO computer for the first time, you need to connect the computer to a power source with the AC adapter.

Check that you are using the supplied Sony AC adapter.

For your safety, use only the genuine Sony AC adapter, which is supplied by Sony for your VAIO computer.

The battery pack may have run out of power.

Note that if you press and hold down the(Power) button for more than 4 or 10 seconds, the computer will turn off.

If you bring your VAIO computer directly from a cold location to a warm one, or use it in a high humidity location, moisture may condense inside the computer.

In such a case, allow at least one hour before turning on the computer.

Do not use the computer in a high humidity location (a relative humidity of more than 80%), as it may cause the computer to malfunction.