Changing Out a Redundant Power Supply to Non-Redundant in a PowerEdge 1800 Server

Our Newest and Geekiest tech, Mike (the kid) Kidd, wrote this step-by-step article on changing a Dell Poweredge 1800 server from a redundant power supply set up to a non redundant power supply set up. Since the redundant power supplies are very difficult to get, this is a great solution to a big problem.

By Mike Kidd

As technology gets a little older, parts become increasingly hard to find and purchase. A true testament of this would be the redundant power supplies for the Dell Poweredge 1800 server.  Even we are having a hard time getting a hold of these little guys. However, you are in luck! There is an alternative to redundant power supplies for the 1800, and this is the Non-redundant unit. So today I will be showing you how to change out your redundant unit with the Non. It may seem like a challenging job, but you will see that it is not that hard and does not take very long to complete, and hey, saving money is good too!

Removing Power Supply from Server

Begin by powering down and unhooking everything from your server. Then, remove the 2 redundant power supplies from the tower. There will be little black tabs on the back of them (pictured left) that you need to “pinch” up, and pull down. The unit will pull out. Now, remove the bezel, tip your case on its side, and remove the side panel. The next step will be to remove the big black fan shroud from the case.

Removing Black fan

There are 2 tabs on the top of the shroud, closest to you (pictured right). Press them both down, while lifting the entire assembly upwards. But do not lift too far; there is still a power wire for the fan attached to the system board. Unhook that wire and set the shroud off to the side.

Now we can begin removing the power distribution board from the system. Unclip the connector from the back plane, and snake it through the chassis into the drive area out of the way. (See below, left)

Remove power distribution board

Next, unclip the 2 white plastic straps located on the power supply cage (See below, center)

Unclip straps on power supply cage

We can go ahead and unclip the main power connectors from the system board along with the ribbon cable, (See below, right) lift them out of the way for now.

Removing main power connectors from system board

This next step can be a bit tricky, unhook the 4 pin powerwire as well as the IDE cable from the cd-rom drive. Now remove the 2 screws that hold the dive in place and push it forward (you can remove it if you like) to give access to the 4 pin power wire on the 3.5” floppy drive. Unclip that wire and pull the wires off to the side with the rest of them.

Here is a picture of the 4 pin wire for floppy drive below. Now it’s time to remove the power distribution board from the chassis. This is done by unscrewing the Phillips head at the top right of the board (pictured below).

Remove 4 pin wire cable

4 pin power wire for floppy

Once loosened, lift up on the board, pull back slightly, and continue pulling up till the board is out. The install of the non-redundant unit is basically the reverse of the removal, except you don’t have the ribbon wire from the redundant unit.  Bundle the wires closely together and fish them through the back of the unit while sliding the power supply into place.

Remove Power Distribution Board

Bundle cables

And then fasten the new unit to the back of the chassis as shown in the picture below, right:

Power Supply in PE1800 Case

Once fastened, go through and run all the power connectors as they were with the power distribution board and it should look like the picture below, once finished. That is it!

Cables reattached without power distribution board

For a complete video How-to install, head over to for this write-up and others. Don’t forget to check out our other videos at our YouTube channel: velocity783.

Have something you would like to know how to do? Or “will it work?”  Then stop in to our website at:  in the video gallery and make a request!

12 thoughts on “Changing Out a Redundant Power Supply to Non-Redundant in a PowerEdge 1800 Server

  1. Brennan says:

    Worked like a charm, except that the PSU replacement that dell sent me didnt take up the whole hole from the old redundant ones. I just put a self taping screw in it to hold it in place. Thanks for the article.

  2. claudiu vanc says:

    hi. iknow this is a very old post, but can you assist me? I have a “predictive power failure on ps1”. Can you help me identifying wich is ps1 and wich is ps2? because both leds are green. the power supplyes are 675w hot plug. Thanks.

    • Sure I can help you. The power supplies on the Dell PE1800 are hot swap so you can put either power supply into either slot and it will work. I looked at a physical server and there is no markings as to power supply one or power supply 2. I looked at the Dell Tech Specs in case I was missing something and there is nothing documented as to power supply 1 or power supply 2 see this link:

      What I do suggest is for you NOT to shut the PE 1800 down. That machine is notorious for power supply failures and we have learned that people will shut the machine down and often times it will not come back up as both supplies (oddly) will fail. If that predictive failure continues the light on the failed one could turn amber and then red and not work, or maybe go from green to red. We have seen it happen both ways. If you have more questions you are more than welcome to message me here or call me at 651-633-0095.

      • claudiu vanc says:

        Hi, thanks for your respone and sorry for my delayed response. I took the option to replace both power suplies with new ones, one at a time. Could not turn off server because is an important part of a global network(Delphi Packard).

  3. Carrie says:

    I know this post is old but maybe you can help!! I have a Dell Poweredge 1800 and both power supplies went out. No power whatsoever! So blinking error lights. So I changed it to the non-redundant power supply (Using your video, thank you!) and Now it starts powering up, Screen comes on and starts loading then, it powers off and the Amber light keeps blinking. Help!! You can email me directly at or on here. Thank you 🙂

    • Carrie,

      Where is the amber light blinking? Is it on the power supply? or one of the lights on the back of the server? It potentially could be a motherboard, but I want to make sure.


  4. Carrie says:

    On the front. Next to the power button. The “power-in Indicator” is flashing green and the “System status indicator” is flashing amber.

    • Hi Carrie,

      It’s probably the motherboard. since it keeps shutting itself down. I’m not sure if there is anyone there that can change it or if you need a tech out there. We have the boards and the techs. There is one thing I do want to caution. If that server just kept rebooting itself there could be a potential for corrupt data. Hopefully you have a backup just in case??


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