54Using Support ToolsSystem MessagesIf your computer has an issue or error, it may displaya system message that will help you identify thecause and action needed to resolve the issue.NOTE: If the message that is displayedis not listed in the following examples,see the documentation for either theoperating system or the program that wasrunning when the message appeared. Youcan also see the Dell Technology Guideavailable on your hard drive or atsupport.dell.com/manuals or contactDell (see “Contacting Dell” on page 74).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. Contact Dell (see “Contacting Dell”on page 74).CMOS checksum error — Possible systemboard failure or Real Time Clock (RTC) batterylow. Replace the coin-cell battery (see theService Manual at support.dell.com/manuals) orcontact Dell (see “Contacting Dell” on page 74).Hard-disk drive failure — Possible harddrive failure during POST. Contact Dell (see“Contacting Dell” on page 74).Keyboard failure — Keyboard failure orloose cable.To replace the keyboard, see the ServiceManual at support.dell.com/manuals.