37Using 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 that appeared is notlisted in the following examples, see thedocumentation for either the operatingsystem or the program that was runningwhen the message appeared or contactDell (see “Contacting Dell” on page 57)for assistance.Alert! Previous attempts at booting thissystem have failed at checkpoint [nnnn]. Forhelp in resolving this problem, please notethis checkpoint and contact Dell TechnicalSupport — The computer failed to completethe boot routine three consecutive times forthe same error. Contact Dell (see “ContactingDell” on page 57) for assistance.CMOS checksum error or RTC is reset, BIOSSetup default has been loaded— Possiblesystem board failure or RTC battery low.Replace the battery (see the Service Manualat support.dell.com/manuals) or ContactDell (see “Contacting Dell” on page 57) forassistance.CPU fan failure — CPU fan has failed. CPU fanneeds replacement. See the Service Manual atsupport.dell.com/manuals.Hard-disk drive failure — Possible hard‑diskdrive failure during POST. Contact Dell (see“Contacting Dell” on page 57) for assistance.Hard-disk drive read failure — Possiblehard‑disk drive failure during HDD boottest. Contact Dell (see “Contacting Dell” onpage 57) for assistance.Keyboard failure — Replace the keyboard orcheck the cable for loose connection.