Dell XPS 15 (L501X, Late 2010) - Manual (Page 68)

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Using Support Tools
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 87) for
assistance.
Hard-disk drive failure — Possible hard‑disk
drive failure during POST. Contact Dell (see
“Contacting Dell” on page 87) for assistance.
Hard-disk drive read failure — Possible
hard‑disk drive failure during HDD boot
test. Contact Dell (see “Contacting Dell” on
page 87) for assistance.
No boot device available — No bootable
partition on hard drive, the hard drive cable is
loose, or no bootable device exists.
If the hard drive is your boot device, ensure •
that the cables are connected and that the
drive is installed properly and partitioned
as a boot device.
Enter system setup and ensure that the •
boot sequence information is correct (see
the Service Manual at support.dell.com/
manuals).
CAUTION - Hard Drive SELF MONITORING
SYSTEM has reported that a parameter has
exceeded its normal operating range. Dell
recommends that you back up your data
regularly. A parameter out of range may
or may not indicate a potential hard drive
problem — S.M.A.R.T error, possible hard drive
failure. Contact Dell (see “Contacting Dell” on
page 87) for assistance.