Dell OptiPlex 7020 (Mid 2014) - Manual (Page 49)

Amber LED State Description
3,5 memory modules are detected, but a memory configuration or compatibility error
3,6 possible system board resource and/or hardware failure
3,7 some other failure with messages on screen
Beep Code
The computer can emit a series of beeps during start-up if the display does not show errors or problems.
These series of beeps, called beep codes, identify various problems. The delay between each beep is 300
ms, the delay between each set of beeps is 3 sec, and the beep sound lasts 300 ms. After each beep and
each set of beeps, the BIOS should detect if the user presses the power button. If so, BIOS will jump out
from looping and execute the normal shutdown process and power system.
Code 1-3-2
Cause Memory failure
Error Messages
Error Message Description
Address mark not
found The BIOS found a faulty disk sector or could not find a particular disk sector.
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 and report the checkpoint code (nnnn) to the support
technician
Alert! Security
override Jumper is
installed. The MFG_MODE jumper has been set and AMT Management features are disabled
until it is removed.
Attachment failed
to respond The floppy or hard drive controller cannot send data to the associated drive.
Bad command or
file name Ensure that you have spelled the command correctly, put spaces in the proper
place, and used the correct pathname.
Bad error-
correction code
(ECC) on disk read The floppy or hard drive controller detected an uncorrectable read error.
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