4
Troubleshooting Your System
Safety First—For You And Your System
CAUTION: Many repairs may only be done by a certified service technician. You should only perform
troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or
telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your
warranty. Read and follow the safety instructions that came with the product.
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 Power On Self Test (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 13. Power LED Diagnostics
Amber LED State White LED State Description
off off system is off
off blinking 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 Description
2,1 system board failure
2,2 system board, PSU, or PSU cabling failure
2,3 system board, memory, or processor failure
2,4 coin-cell battery failure
2,5 corrupt BIOS
2,6 processor configuration failure or processor failure
2,7 memory modules are detected, but a memory failure
3,1 possible peripheral card or system board failure
3,2 possible USB failure
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