24Using Support ToolsSystem MessagesIf your computer has an issue or error, it maydisplay a System Message that will help youidentify the cause and action needed to resolvethe issue.NOTE: If the message you received is notlisted in the following examples, see thedocumentation for either the operatingsystem or the program that was runningwhen the message appeared. Alternativelyyou could see the Service Manual on theDell Support website at support.dell.comor see “Contacting Dell” on page 34 forassistance.Alert! Previous attempts at booting this systemhave failed at checkpoint [nnnn]. For helpin resolving this problem, please note thischeckpoint and contact Dell TechnicalSupport — The computer failed to completethe boot routine three consecutive times for thesame error see “Contacting Dell” on page 34 forassistance.CMOS checksum error — Possible motherboardfailure or RTC battery low. Replace the battery.See the Service Manual on the Dell Supportwebsite at support.dell.com or see “ContactingDell” on page 34 for assistance.Hard-disk (HDD) drive failure — Possiblehard disk drive failure during HDD POST, see“Contacting Dell” on page 34 for assistance.Hard-disk (HDD) drive read failure — Possiblehard disk drive failure during HDD boot test see“Contacting Dell” on page 34 for assistance.Keyboard failure — Keyboard failure or loosecable.No boot device available — No bootablepartition on hard disk drive, the hard disk driveconnector is loose, or no bootable device exists.If the hard drive is your boot device, ensure•that the connector is connected and that thedrive is installed properly and partitioned asa boot device.