29Using 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 43 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 43for assistance).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 43 for assistance.CPU fan failure — CPU fan has failed. Replacethe CPU fan. See the Service Manual on the DellSupport website at support.dell.com.Hard-disk drive failure — Possible hard diskdrive failure during HDD POST (see “ContactingDell” on page 43 for assistance).Hard-disk drive read failure — Possible harddisk drive failure during HDD boot test (see“Contacting Dell” on page 43 for assistance).Keyboard failure — Keyboard failure or loosecable.No boot device available — No bootablepartition on hard disk drive, the hard disk drivecable is loose, or no bootable device exists.