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Alert! Previous attempts at booting this system
have failed at checkpoint [nnnn]. For help
in resolving this problem, please note this
checkpoint and contact Dell Technical
Support — The computer failed to complete
the boot routine three consecutive times for the
same error. Contact Dell (see “Contacting Dell”
on page 73).
CMOS checksum error — Possible system
board failure or RTC battery low. Replace the
battery (see the Service Manual at support.dell.
com/manuals) or Contact Dell (see “Contacting
Dell” on page 73).
CPU fan failure — CPU fan has failed. Replace
the CPU fan (see the Service Manual at
support.dell.com/manuals).
Hard-disk drive failure — Possible hard-disk
drive failure during POST. Contact Dell (see
“Contacting Dell” on page 73).
Hard-disk drive read failure — Possible hard-
disk drive failure during HDD boot test. Contact
Dell (see “Contacting Dell” on page 73).
Keyboard failure — Keyboard failure or
loose cable.
To replace the keyboard, see the Service
Manual at support.dell.com/manuals.