System Flash Codes
When errors that occur during the boot routine cannot be reported on the display or on an external monitor (if attached), the Num Lock, Caps Lock,
and Scroll Lock indicators (see
Figure 1
) may flash together in a pattern of lights (or
flash code
) that identifies the problem. For example, one
flash, followed by a second flash, and then a burst of three flashes (code 1-1-3) means that the computer was unable to read the data in nonvolatile
random-access memory (NVRAM). This information is important to the Dell support staff if you need to call for technical assistance.
The Num Lock, Caps Lock, and Scroll Lock indicators flash briefly when the computer is turned on. The flash codes, if needed, occur after the boot
routine.
Figure 1. Flash Code Indicators
Memory odd/even logic
failure at address,
read value expecting
value
Memory write/read
failure at address,
read value expecting
value
No boot device
available
The computer cannot find the diskette or
hard-disk drive.
If the diskette drive is your
boot device
, make sure that there is a
bootable diskette in the drive. If the hard-disk drive is your boot
device, make sure that the drive is installed, properly seated, and
partitioned as a boot device.
No boot sector on
hard-disk drive
The operating system may be corrupted.
Reinstall your operating system. See the documentation that came
with your operating system.
No timer tick
interrupt
A chip on the system board may be
malfunctioning.
Run the
System Set
tests in the
Dell Diagnostics
.
Non-system disk or
disk error
The diskette in drive A or your hard-disk
drive does not have a bootable
operating system installed on it.
If you are trying to boot from the diskette, replace it with one that
has a bootable operating system.
Not a boot diskette
There is no operating system on the
diskette.
Boot the computer with a diskette that contains an operating
system.
Optional ROM bad
checksum
The optional ROM apparently failed.
Call Dell
for technical assistance.
Sector not found
The operating system cannot locate a
sector on the diskette or hard-disk drive.
You probably have a bad sector or
corrupted FAT on the diskette or hard-
disk drive.
Run the appropriate utility to check the file structure on the diskette
or hard-disk drive. If a large number of sectors are defective, back
up the data (if possible), and then reformat the diskette or hard-
disk drive.
Seek error
The operating system cannot find a
specific track on the diskette or hard-
disk drive.
If the error is on the diskette drive, try another diskette in the drive.
Shutdown failure
A chip on the system board may be
malfunctioning.
Run the
System Set
tests in the
Dell Diagnostics
.
Time-of-day clock lost
power
Data stored in NVRAM has become
corrupted.
Connect your computer to an electrical outlet to charge the battery.
If the problem persists, try to restore the data. To restore the data,
press <Fn><F1> to
enter the System Setup program
. Then
immediately exit it. If the message reappears,
call Dell
for
technical assistance.
Time-of-day clock
stopped
The reserve battery that supports the
data stored in NVRAM may be dead.
Connect your computer to an electrical outlet to charge the battery.
If the problem persists,
call Dell
for technical assistance.
Time-of-day not set-
please run the System
Setup program
The time or date stored in the System
Setup program does not match the
system clock.
Correct the settings for the
Date
and
Time
options. (For
instructions, see "
System Setup Program
.")
Timer chip counter 2
failed
A chip on the system board may be
malfunctioning.
Run the
System Set
tests in the
Dell Diagnostics
.
Unexpected interrupt
in protected mode
The keyboard controller may be
malfunctioning, or an installed memory
module may be loose.
Run the
System Memory
tests and the
Keyboard Controller
test in the
Dell Diagnostics
.
Warning: Battery is
critically low.
The battery is running out of charge.
Replace the
battery
, or connect the computer to an electrical
outlet. Otherwise, activate
suspend-to-disk
mode or turn off the
computer.
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