HERE are the manuals for you exact model server. it's the best place to start.
You should get into the System Event Log and review the records. The orange LED speaks to a much larger number of errors than just the CMOS battery.
SOURCE: Flashing orange light
Power edge system are having two power input check the cables from the power outlet may be one is in contact otherwise one of your power supply gone means not working. Check the wires first then the power supply units
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