146 Troubleshooting• 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.T E S T T H E K E Y B O A R D — Connect a properly working keyboard to the computer, thentry using the keyboard.R U N T H E H A R D W A R E T R O U B L E S H O O T E R — See "Hardware Troubleshooter" onpage 135.Lockups and Software ProblemsWARNING: Before working inside your computer, read the safety informationthat shipped with your computer. For additional safety best practices information,see the Regulatory Compliance Homepage atwww.dell.com/regulatory_compliance.The computer does not start upC H E C K T H E D I A G N O S T I C L I G H T S — See "Power Lights" on page 123.E N 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 respondingCAUTION: You may lose data if you are unable to perform an operating systemshutdown.T U 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.A program stops respondingE N D T H E P R O G R A M —1 Press simultaneously to access the Task Manager.2 Click the Applications tab.3 Click to select the program that is no longer responding.4 Click End Task.
