36 Solving ProblemsLockups and Software ProblemsCAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the ProductInformation Guide.The computer does not start upThe computer stops respondingNOTICE: You might lose data if you are unable to perform an operating system shutdown.CH 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 (see "Turning Off Your Computer" on page 59), reconnect the keyboard cableas shown on the setup diagram for your computer, and then restart the computer.• Check the cable connector for bent or broken pins and for damaged or frayed cables. Straighten bentpins.• Remove keyboard extension cables and connect the keyboard directly to the computer.TE S T T H E K E Y B O A R D — Connect a properly working keyboard to the computer, and try using thekeyboard.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 "Resolving Software and Hardware Incompatibilities"on page 53.CH E C K T H E DI A G N O S T I C LI G H T S — See "Diagnostic Lights" on page 47.EN 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 O T H E E L E C T R I C A LO U T L E T .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 on your keyboard ormoving your mouse, press and hold the power button for at least 8 to 10 seconds until the computerturns off. Then restart your computer.
