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Dell OptiPlex 3020–Small Form Factor Owner's Manual

Power LED Diagnostics

The power button LED located on the front of the chassis also functions as a bicolored diagnostic LED. The diagnostic LED is only active and visible during the POST process. Once the operating system starts to load, it is no longer visible.

Amber LED blinking scheme – The pattern is 2 or 3 blinks followed by a short pause then x number of blinks up to 7. The repeated pattern has a long pause inserted in the middle. For example 2,3 = 2 amber blinks, short pause, 3 amber blinks followed by long pause then repeats.

Table 1. Power LED Diagnostics
Amber LED State White LED State Description
off off system is OFF
off breathing system is in sleep state
blinking off power supply unit (PSU) failure
steady off PSU is working but failed to fetch code
off steady system is ON
Amber LED State
system board failure
system board, PSU or PSU cabling failure
system board, memory or CPU failure
2, 4
coin-cell battery failure
corrupt BIOS
CPU configuration failure or CPU failure
memory modules are detected, but a memory failure
possible peripheral card or system board failure
possible USB failure
no memory modules are detected
possible system board error
memory modules are detected, but a memory configuration or compatibility error
possible system board resource and/or hardware failure
some other failure with messages on screen

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