56 TroubleshootingUSB KeyboardCH E C K T H E K E Y B O A R D C A B L E —• Ensure that the keyboard cable is firmly connected to the computer.• Shut down the computer, reconnect the keyboard cable as shown on the setupdiagram for your computer, and then restart the computer.• Ensure that the cable is not damaged or frayed and check cable connectors for bent orbroken pins. Straighten any bent pins.• Remove any keyboard extension cables and connect the keyboard directly to thecomputer.Any KeyboardTE S T T H E K E Y B O A R D — Connect or pair a properly working keyboard to thecomputer, then try using the keyboard. See "Re-Syncing Your Optional WirelessMouse or Keyboard with Your Computer" on page 44.RU N T H E HA R D W A R E TR O U B L E S H O O T E R — See "Troubleshooting Software andHardware Problems in the Microsoft® Windows® Vista™ Operating Systems" onpage 78.SE E Y O U R K E Y B O A R D D O C U M E N T A T I O N — If your keyboard has documentation, seeif it has special troubleshooting suggestions or recommendations.Lockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.The computer does not start upEN S U R E T H A T T H E P O W E R C A B L E I S F I R M L Y C O N N E C T E D T O T H E C O M P U T E R A N D T OT H E E L E C T R I C A L O U T L E TThe computer stops respondingNOTICE: You may lose data if you are unable to perform an operating systemshutdown.TU R N T H E C O M P U T E R O F F — If you are unable to get a response by pressing a key onyour keyboard or moving your mouse, press and hold the power button for at least 8 to10 seconds (until the computer turns off), and then restart your computer.