134 TroubleshootingSystem MessagesNOTE: If the message you received is not listed in the table, see the documentationfor either the operating system or the program that was running when the messageappeared.A L E R T ! P R E V I O U S A T T E M P T S A T B O O T I N G T H I S S YS T E M H A V E F A I L E D A TC H E C K P O I N T [ N N N N ]. F O R H E L P I N R E S O L V I N G T H I S P R O B L E M , P L E A S E N O T E T H I SC H E C K P O I N T A N D C O N T A C T D E L L T E C H N I C A L S U P P O R T — The computer failed tocomplete the boot routine three consecutive times for the same error. Contact Delltechnical support(see "Contacting Dell" on page 159).C M OS C H E C K S U M E R R O R — Possible motherboard failure or RTC battery low.Replace the battery (see "Coin-Cell Battery" on page 93).C PU F A N F A I L U R E — CPU fan failure. Replace the CPU fan (see "Removing theProcessor" on page 99).F L O P P Y D I S K E T T E S E E K F A I L U R E — A cable may be loose, or the computerconfiguration information may not match the hardware configuration. Check cableconnections. If the problem persists contact Dell technical support (see "ContactingDell" on page 159).D I S K E T T E R E A D F A I L U R E — The floppy disk may be defective or a cable may beloose. Replace the floppy disk/check for a loose cable connection.H A R D - D I S K R E A D F A I L U R E — Possible HDD failure during HDD boot test. ContactDell technical support (see "Contacting Dell" on page 159).K E Y B O A R D F A I L U R E — Keyboard failure or keyboard cable loose (see "KeyboardProblems" on page 145).N O B O O T D E V I C E A V A I L A B L E — The system cannot detect a bootable device orpartition.• If the floppy drive is your boot device, ensure the cables are connected and abootable floppy disk is in the drive.• If the hard drive is your boot device, ensure the cables are connected, and that thedrive is installed properly and partitioned as a boot device.BlinkingGreenThe computer is instandby mode.Press a key on the keyboard, move themouse, or press the power button toresume normal operation.Light Pattern Problem Description Suggested Resolution
