HP ProBook 4525s Getting Started - Windows Vista - Page 16

Product Information and Troubleshooting Quick troubleshooting The computer is unable to start up If the computer does not turn on when you press the power button, the following suggestions may help you resolve the problem: ■ If the computer is plugged into an AC outlet, unplug the computer and then plug another electrical device into the outlet to be sure that the outlet is providing adequate power. ✎ Use only the AC adapter provided with the computer or one approved by HP for this computer. ■ If the computer is running on battery power or is plugged into an external power source other than an AC outlet, plug the computer into an AC outlet using the AC adapter. Be sure that the power cord and AC adapter connections are secure. The computer screen is blank If the screen is blank, but the computer is on and the power light is lit, the computer may not be set to display the image on the computer screen. To transfer the image to the computer screen, press fn+f4. Software is functioning abnormally If the software is unresponsive or responds abnormally, follow these suggestions: ■ Restart the computer. Click Start, click the arrow next to the Lock button, and then click Restart. If you cannot restart the computer using this procedure, refer to the next section, "The computer is on but is not responding." ■ Run a virus scan. For information about using the antivirus resources on the computer, refer to the antivirus software Help for more details. The computer is on but is not responding If the computer is on but is not responding to software or keyboard commands, try the following emergency shutdown procedures, in the sequence provided, until shutdown occurs: Ä CAUTION: Emergency shutdown procedures will result in the loss of unsaved information. ■ Press and hold the power button on the computer for at least 5 seconds. ■ Disconnect the computer from external power and remove the battery. 12 Getting Started