Troubleshooting Your System; Safety First-For You And Your System; Power Led Diagnostics - Dell PowerEdge T20 Owner's Manual

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
off
off
blinking
steady
off
Amber LED Description
State
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
62
White LED State
off
blinking
off
off
steady
Description
system is off
system is in sleep state
power supply unit (PSU) failure
PSU is working but failed to fetch code
system is on
4