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S4100–ON Series S4128F-ON, S4148F-ON, and S4148FE Installation Guide November 2017

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AC or DC power supply replacement

  • CAUTION: Disconnect the power cord before removing the power supplies. Also, disconnect all power cords before servicing.
  • NOTE: The PSU slides into the slot smoothly. Do not force a PSU into a slot as this action may damage the PSU or the S4100–ON Series switch.
  • NOTE: If a PSU fails, you must replace the entire unit. There are no field serviceable components in the PSU. To request a hardware replacement, see Dell EMC support.
  • NOTE: If you use a single PSU, install a blank plate in the other PSU slot. If you are only using one power supply, Dell EMC recommends installing the power supply in the first slot, PSU1. Install a blank plate in the second slot, PSU2.
  1. Disconnect the power cable from the PSU.
  2. Use the grab handle to slide the PSU out of the power supply bay.
  3. Use the grab handle on the replacement PSU to slide it into the power supply bay.
  4. Attach the power cord to the replacement PSU.
    • NOTE: The switch powers up when the cables are connected between the power supply and the power source.

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