Table 11: Power Off Led States For A Power Supply Module - Tektronix ECO8000 Series User Manual

Operating Basics
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The following table shows the states of the AC and DC LEDs on a Power Supply
module when the power is off. The LEDs will blink for several minutes after
power is removed from the instrument to help troubleshoot power problems.

Table 11: Power off LED states for a Power Supply module

Power Supply state
AC present, DC bad
AC missing, DC missing
AC present, supply not installed
AC missing, supply not installed
AC present, DC present, on-board converter
failure
Troubleshooting power supply problems. For troubleshooting power supply
problems, take these steps:
If the AC LED is red, verify the power source connecting to the instrument.
If the DC LED is red, replace the supply module.
Examine the STATUS menu display and the Event Log readouts to locate
details on the nature of the faults.
ECO8000 Series Automatic Changeover Unit User Manual
AC LED state DC LED state
Flash green Flash red
Flash red Off
Flash green Off
Off Off
Flash green Flash green