HP Tc4400 Troubleshooting - Page 8

Quick checklist The computer is turned on, but is not responding. If the computer is turned on, but is not responding to software applications or keyboard commands, try first to shut down the computer through the operating system by selecting Start > Turn Off Computer > Turn Off. (If you have been registered to a domain, the button you click will be called Shut Down instead of Turn Off Computer.) If the computer remains unresponsive, try the emergency shutdown procedures in the following sequence: 1. If the computer is in Windows, press ctrl+alt+delete. Then, select Shut Down > Turn Off. 2. If you cannot shut down the computer by using ctrl+alt+delete, press and hold the power button for at least 5 seconds. 3. If you cannot shut down the computer by using the power button, unplug the computer from external power and remove the battery pack. ✎ If you cannot turn the computer back on after shutting it down, refer to "The computer will not start up." 1-6 Troubleshooting