Using Support Tools
CMOS checksum error — Possible system
board failure or Real Time Clock (RTC) battery
low. Replace the coin-cell battery (see the
Service Manual at support.dell.com/manuals) or
contact Dell (see "Contacting Dell" on page 71).
CPU fan failure — CPU fan has failed. Replace
the CPU fan (see the Service Manual at
Hard-disk drive failure — Possible hard
drive failure during POST. Contact Dell (see
"Contacting Dell" on page 71).
Hard-disk drive read failure — Possible hard
drive failure during HDD boot test. Contact Dell
(see "Contacting Dell" on page 71).
Keyboard failure — Keyboard failure or
To replace the keyboard, see the Service
Manual at support.dell.com/manuals.
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 Dell
Technology Guide on your hard drive or at
No timer tick interrupt — A chip on the system
board might be malfunctioning or there might be
a system board failure. See the Service Manual
at support.dell.com/mauals or contact Dell for
assistance (see "Contacting Dell" on page 71).