Dell Inspiron 11z (1121, Late 2010) - Manual (Page 49)

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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). Contact Dell (see
“Contacting Dell” on page 67) for assistance.
Hard-disk drive failure — Possible hard‑disk
drive failure during POST. Contact Dell (see
“Contacting Dell” on page 67) for assistance.
Hard-disk drive read failure — Possible
hard‑disk drive failure during HDD boot test.
Contact Dell (see “Contacting Dell” on page 67)
for assistance.
CPU fan failure — CPU fan has failed. Replace
the CPU fan (see the Service Manual at
support.dell.com/manuals).
Keyboard failure — Keyboard failure or
loose cable.
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
support.dell.com/manuals).
No timer tick interrupt — A chip on the system
board might be malfunctioning or there might
be a system board failure. Contact Dell (see
“Contacting Dell” on page 67) for assistance.
USB over current error — Disconnect the USB
device. Your USB device needs more power for
it to function properly. Use an external power
source to connect the USB device, or if your
device has two USB cables, connect both
of them.