Deco X20 acting weird after a sudden shutdown after a power outage

Deco X20 acting weird after a sudden shutdown after a power outage

Deco X20 acting weird after a sudden shutdown after a power outage
Deco X20 acting weird after a sudden shutdown after a power outage
2025-07-18 09:32:12 - last edited 2025-08-06 11:35:28
Model: Deco X20  
Hardware Version: V3
Firmware Version: 1.2.4 Build 20241227 Rel. 63367

I have 2 Deco X20 in a mesh setup. The main deco (Deco 1) is connected to the ISP router while the satelllite/node (Deco 2) is connected to the main deco wirelessly. Unfortunately, the Deco 1 started acting weird after a power fluctuation. 

 

One of the main issues was it resetting itself everytime i reboot it. This happened as soon as power came back and turned itself on. I immediately checked after noticing that the internet was taking a bit too long to return and saw Deco 1 was blinking blue, which has never happened before after similar power fluctuations. It would usually just stay in red then become green after establishing internet connection. I then proceeded to set up my network again which worked fine, until I rebooted it and it proceeded to blink blue again. This happens every reboot now which means I have to do the whole setup again just to access internet.

 

Another issue is the mesh network not working anymore. After the initial re-setup that I did after the power fluctuation, I noticed that my devices were not connecting to Deco 2 anymore. Deco 2 works fine and doesn't reset itself after a reboot, as it normally should, so I decided to swap Deco 2 (now main) to Deco 1 (now satellite). Deco 1 connects to Deco 2 just fine and I can even ping it from my PC with Command Prompt, but devices still can't connect to Deco 1 despite them being literally beside it. And since it resets itself ater a reboot, what ends up happening is my network acts as if Deco 1 is a new device everytime it reboots, and undoes all my configurations like its designated location (living room, office, etc). It also weirdly still broadcasts its default SSID with no password. So I can connect to Deco 1 using the default SSID that has no password and get internet connection, just not connect to it when in my "mesh network". Simply, it's not "meshing" anymore. 

 

Any hope of fixing this or is this deco bound to the garbage now?

 

EDIT: reworded power "outage" to power "fluctuation" since it's more appropriate.

 

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#1
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1 Accepted Solution
Re:Deco X20 acting weird after a sudden shutdown after a power outage-Solution
2025-08-06 07:39:18 - last edited 2025-08-06 07:39:27

  @smx11037 

Hi, welcome to the community. Thanks a lot for your time and patience.

Did "Deco 1" auto-reset itself after a reboot, no matter when working as the main Deco or satellite Deco?

If yes, it is suggested to refer to this link to run the firmware recovery once, then flash the same 1.2.4 version on the web UI:

How to use firmware recovery if the Deco become brick

 

By the way, may I know how long you have had the Deco?

Wait for your reply.

Best regards.

 

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#2
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Re:Deco X20 acting weird after a sudden shutdown after a power outage-Solution
2025-08-06 07:39:18 - last edited 2025-08-06 07:39:27

  @smx11037 

Hi, welcome to the community. Thanks a lot for your time and patience.

Did "Deco 1" auto-reset itself after a reboot, no matter when working as the main Deco or satellite Deco?

If yes, it is suggested to refer to this link to run the firmware recovery once, then flash the same 1.2.4 version on the web UI:

How to use firmware recovery if the Deco become brick

 

By the way, may I know how long you have had the Deco?

Wait for your reply.

Best regards.

 

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#2
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Re:Deco X20 acting weird after a sudden shutdown after a power outage
2025-08-06 11:39:38

  @David-TP Hi. Thanks for the reply. I'll try your suggested solution and post an update for what happens

 

A bit more info:

I had the deco since January 2024 and been using it since then. Deco 1 auto-resets itself everytime after a reboot after that one power fluctuation, regardless if it's the main or satellite deco. Deco 2 continues to work just fine. For context, power fluctuations are not common in my area, but probably happens at least once or twice in a year, and it would usually just be a very quick one, 3 seconds max and that is if it's really bad. I have both decos plugged in an extension cord/outlet with a surge protection feature. 

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#3
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Re:Deco X20 acting weird after a sudden shutdown after a power outage
2025-08-07 12:06:07

@David-TP Hi. I tried your suggested solution and when I try accessing 192.168.0.1 for the firmware upgrade, I'm met with this message on the screen (see screenshot)

I tried uploading the firmware available in the support page for my specific hardware version and got it installed the firmware just fine. However, the same problem still occurs. I tried doing the manual firmware upgrade again, same still happens. Same error message in 192.168.0.1, still resets every reboot, etc.

 

Another update since i only got my hands on an extra ethernet cable recently.

Devices connected to Deco 1 via wired works just fine as it should be. The problem is the wireless connection. No device can connect to it, even if I force them using the Deco app (setting device to prefer Deco 1 only). The device simply gets disconnected to the wireless connection and won't reconnect unless I set the preference back to auto. 

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#4
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