94 TroubleshootingME M O R Y W R I T E /R E A D F A I L U R E A T A D D R E S S , R E A D V A L U E E X P E C T I N G V A L U E — A memory module may befaulty or improperly seated. Reinstall the memory modules and, if necessary, replace them (see "Memory"on page 119).NO B O O T D E V I C E A V A I L A B L E — The computer cannot find the hard drive. If the hard drive is your bootdevice, ensure that the drive is installed, properly seated, and partitioned as a boot device.NO B O O T S E C T O R O N H A R D D R I V E — The operating system may be corrupted. Contact Dell. See"Contacting Dell" on page 141.NO T I M E R T I C K I N T E R R U P T — A chip on the system board may be malfunctioning. Run the System Settests in the Dell Diagnostics (see page 85).NO T E N O U G H M E M O R Y O R R E S O U R C E S . EX I T S O M E P R O G R A M S A N D T R Y A G A I N — You have too manyprograms open. Close all windows and open the program that you want to use.OP E R A T I N G S YS T E M N O T F O U N D — Reinstall the hard drive (see "Hard Drive" on page 116). If the problempersists, contact Dell. See "Contacting Dell" on page 141.OP T I O N A L ROM B A D C H E C K S U M — The optional ROM apparently failed. Contact Dell. See "ContactingDell" on page 141.A R E Q U I R E D .DLL F I L E W A S N O T F O U N D — The program that you are trying to open is missing an essentialfile. Remove and then reinstall the program.1 Click the Start button and click Control Panel.2 Click Add or Remove Programs.3 Select the program you want to remove.4 Click Remove or Change/Remove and follow the prompts on the screen.5 See the program documentation for installation instructions.SE C T O R N O T F O U N D — The operating system cannot locate a sector on the hard drive. You may have adefective sector or corrupted FAT on the hard drive. Run the Windows error-checking utility to check thefile structure on the hard drive. See the Windows Help and Support Center for instructions. To accessthe Help and Support Center, see "Windows Help and Support Center" on page 13. If a large number ofsectors are defective, back up the data (if possible), and then reformat the hard drive.SE E K E R R O R — The operating system cannot find a specific track on the hard drive.SH U T D O W N F A I L U R E — A chip on the system board may be malfunctioning. Run the System Set tests inthe Dell Diagnostics (see page 85).TI M E -O F -D A Y C L O C K L O S T P O W E R — System configuration settings are corrupted. Connect your computerto an electrical outlet to charge the battery. If the problem persists, try to restore the data by entering thesystem setup program. Then immediately exit the program. See "Using the System Setup Program" onpage 171. If the message reappears, contact Dell. See "Contacting Dell" on page 141.TI M E -O F -D A Y C L O C K S T O P P E D — The reserve battery that supports the system configuration settings mayrequire recharging. Connect your computer to an electrical outlet to charge the battery. If the problempersists, contact Dell. See "Contacting Dell" on page 141.