Help Needed with Deco M5 Units Stuck on Yellow/Orange Light

Help Needed with Deco M5 Units Stuck on Yellow/Orange Light

Help Needed with Deco M5 Units Stuck on Yellow/Orange Light
Help Needed with Deco M5 Units Stuck on Yellow/Orange Light
2025-07-28 06:10:34 - last edited 2025-08-04 11:09:15
Model: Deco M5  
Hardware Version: V3
Firmware Version: 1.7.8 Build 20240719 Rel. 70981

Hello,

I would like to ask for your help. I’ve been using four Deco M5 units in one mesh network in "Router" mode for several years. Unfortunately, I’ve often experienced high latency (bad ping, dropped packets) within my local network. Sometimes restarting the main Deco unit helped, but the situation has been getting progressively worse.

Yesterday, I decided to change the network topology — I’m now using a separate router and switched the Deco units to "Access Point" mode. I also decided to reset all units to factory settings. However, I now have two units that I’m unable to reset.

When I plug them into power, the LED lights up yellow/orange continuously and never changes color. Pressing the reset button has no effect. I’ve tried pressing it briefly (1 second), for a longer time (over 10 seconds), and both before and during power-up — still, the light remains permanently yellow/orange.

Could you please advise me on what to do?

Thank you very much.

Best regards,
Marek

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#1
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1 Accepted Solution
Re:Help Needed with Deco M5 Units Stuck on Yellow/Orange Light-Solution
2025-07-29 08:12:43 - last edited 2025-08-04 11:09:15

  @Mrava 

Hi, welcome to the community.

Have you tried swapping the power adapter with the other two Deco M5s that work well?

Please also change to another power socket.

 

Wait for your reply.

Best regards.

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#2
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Re:Help Needed with Deco M5 Units Stuck on Yellow/Orange Light-Solution
2025-07-29 08:12:43 - last edited 2025-08-04 11:09:15

  @Mrava 

Hi, welcome to the community.

Have you tried swapping the power adapter with the other two Deco M5s that work well?

Please also change to another power socket.

 

Wait for your reply.

Best regards.

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#2
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Re:Help Needed with Deco M5 Units Stuck on Yellow/Orange Light
2025-08-07 07:28:41

  @David-TP 

Hi,

sorry for delayed response, I was gone. You were right, if I use power adapter from working unit, problematic units work too.

I believe it can cause all my problems in network. I have 4 units and probably at least 2-3 power adapters are wrong.

How can I get new power adapters?

 

Thank you for advice.

 

Marek

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#3
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Re:Help Needed with Deco M5 Units Stuck on Yellow/Orange Light
2025-08-07 08:47:46

  @Mrava 

Hi, thanks for getting back to me.

I'm afraid you might need to check with the local support.

https://www.tp-link.com/cz/support/contact-technical-support/#Hotline-Support

Or the power adapter of Deco M5_v3 is:

External Power Supply: 12 V/1.2 A

You can also check online to find a suitable power adapter.

Best regards.

 

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