Dell Inspiron 15z (1570, Mid 2009) - Manual (Page 45)

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Using Support Tools
System Messages
If your computer has an issue or error, it may
display a System Message that will help you identify
the cause and action needed to resolve the issue.
NOTE: If the message you received is not
listed in the following examples, see the
documentation for either the operating
system or the program that was running
when the message appeared. Alternatively
you could see the Dell Technology Guide
on your hard drive or on the Dell Support
website at support.dell.com or see
“Contacting Dell” on page 63 for assistance.
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 for assistance
(see “Contacting Dell” on page 63).
CMOS checksum error — Possible motherboard
failure or Real Time Clock (RTC) battery low.
Replace the RTC coin-cell battery (see the
Service Manual on the Dell Support website
at support.dell.com) or contact Dell (see
“Contacting Dell” on page 63).
CPU fan failure — CPU fan has failed. Replace
the CPU fan (see the Service Manual on the Dell
Support website at support.dell.com).
Hard-disk drive failure — Possible hard disk
drive failure during POST. Contact Dell for
assistance (see “Contacting Dell” on page 63).
Hard-disk drive read failure — Possible hard
disk drive failure during HDD boot test. Contact
Dell for assistance (see “Contacting Dell” on
page 63).
Keyboard failure — Keyboard failure or
loose cable.
To replace the keyboard, see the Service
Manual on the Dell Support website at
support.dell.com.