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Having a TP-Link Deco X90 Wi-Fi Extender not working as expected can be frustrating, especially when you're relying on it for reliable, high-speed internet throughout your home. Whether you’re facing slow speeds, frequent disconnections, or no connection at all, troubleshooting these issues quickly can get your network back on track.

In this article, we’ll guide you through common problems with the TP-Link Deco X90 Wi-Fi Extender and provide solutions to help you resolve these issues. From power cycling to network reconfiguration, we’ve got you covered.

Common Issues with TP-Link Deco X90 Wi-Fi Extender

When your TP-Link Deco X90 Wi-Fi Extender is not working, the issue could stem from a variety of factors. Some of the most common reasons for malfunctions include improper placement, firmware issues, interference, or a weak signal from the main router. Here's a list of possible problems and their solutions:

1. Power Issues (No Power or LED Not Lit)

If the Deco X90 extender isn’t turning on or the LED indicator isn't lighting up, there may be a power issue.

Solution:

  • Check the power source: Ensure the power outlet is working. Test it by plugging in another device to confirm the outlet is functional.
  • Check the power cable: Ensure the power adapter is securely connected to both the extender and the power outlet. If the power cable is damaged, you may need a replacement.
  • Try another outlet: Sometimes, the outlet may be faulty. Plug the extender into a different outlet to rule out the power source.

2. Wi-Fi Extender Not Connecting to Router

If the TP-Link Deco X90 Wi-Fi Extender is not connecting to your router or existing mesh system, it could be due to network settings, incorrect configuration, or issues with the Wi-Fi signal.

Solution:

  • Reboot the devices: Unplug the Deco X90 and your primary router, wait 30 seconds, then plug them back in. This can resolve temporary connection issues.
  • Ensure the correct setup mode: Double-check that the Deco X90 is set to the correct mode (as an extender) in the Deco app. If it's not in extender mode, it won't connect to your existing network.
  • Check the router's signal: If the signal from the main router is weak or unstable, the extender may not connect properly. Try moving the Deco X90 closer to the main router or ensure the router is not blocked by walls or large metal objects.

3. Poor Wi-Fi Signal or Slow Speeds

If you’re experiencing poor signal strength or slow speeds, even after the extender has connected to the network, there could be interference, improper placement, or settings that need adjustment.

Solution:

  • Reposition the extender: Ensure that the Deco X90 is placed in a location with a strong signal from the main router. Avoid placing it too far from the router or in areas with thick walls, large appliances, or other obstructions.
  • Minimize interference: Devices like microwaves, cordless phones, and baby monitors can interfere with the Wi-Fi signal. Try to move the Deco X90 away from these devices to improve performance.
  • Use the 5 GHz band: If possible, connect your devices to the 5 GHz band instead of the 2.4 GHz band, as the 5 GHz band typically offers faster speeds and is less congested.

4. Deco X90 Keeps Disconnecting

If your TP-Link Deco X90 Wi-Fi Extender keeps disconnecting from the main router or mesh system, this could be a problem with your internet connection, interference, or firmware.

Solution:

  • Check your internet connection: If the main router is not providing a stable internet connection, the Deco X90 will not work properly. Test the router by connecting a device directly to it via Ethernet to verify if the internet connection is stable.
  • Update firmware: Outdated firmware can cause connectivity issues. Use the Deco app to check if there’s a firmware update available for your Deco X90 and install it.
  • Change the Wi-Fi channel: If the Wi-Fi channels are overcrowded (especially in apartment buildings), your router and extender may be experiencing interference. Change the Wi-Fi channel from the Deco app to improve stability.

5. Unable to Access Deco X90 Settings

Sometimes, the Deco X90 might be working fine, but you may not be able to access its settings through the Deco app, or you may not be able to make changes.

Solution:

  • Check app connectivity: Ensure that your phone or device is connected to the Deco network or is using the correct Wi-Fi network to access the app.
  • Factory reset: If you are still having trouble accessing the settings, you can perform a factory reset. Press and hold the reset button on the back of the Deco X90 for 10-15 seconds until the LED blinks orange. After resetting, you can set up the extender again from scratch.

TP-Link Deco X90 Wi-Fi Extender FAQ

1. Why is my TP-Link Deco X90 Wi-Fi Extender not working?
There are several potential reasons your TP-Link Deco X90 might not be working, including power issues, weak signal from the router, poor placement, or outdated firmware. We recommend checking these areas first to resolve the problem.

2. How can I reset my TP-Link Deco X90 Wi-Fi Extender?
To reset your Deco X90, press and hold the reset button on the back of the unit for about 10-15 seconds. Once the LED indicator blinks orange, the reset is complete. You can then set up the device again from the beginning.

3. How do I reconnect my TP-Link Deco X90 to the router?
If your Deco X90 is disconnected from the router, open the Deco app and select the Add Deco option to reconnect. If necessary, reboot both the router and extender, and ensure the extender is within range of the router's signal.

4. Why is my TP-Link Deco X90 Wi-Fi extender not giving me fast speeds?
Poor placement, interference, or using the wrong band (2.4 GHz vs 5 GHz) can affect your Deco X90's speed. Move the extender closer to the router, avoid physical obstructions, and connect to the 5 GHz band for faster speeds.

5. How many devices can my TP-Link Deco X90 support?
The TP-Link Deco X90 can support up to 200 devices at once, making it perfect for large homes with multiple connected devices like smart TVs, security cameras, and smart home products.

6. Can I use TP-Link Deco X90 as a stand-alone router?
Yes, the TP-Link Deco X90 can function as a standalone mesh router. It’s designed to work as part of a mesh network, so you can use it as a primary router or as an extender to boost coverage in your home.

Conclusion

If your TP-Link Deco X90 Wi-Fi Extender not working, don’t panic. Whether it's a power issue, weak signal, poor placement, or firmware problem, the solutions we’ve outlined can help you quickly troubleshoot and resolve the issue. With a few simple fixes, you can get your extender up and running again, ensuring your home gets the reliable, high-speed Wi-Fi coverage it needs.

If you’ve tried these solutions and the problem persists, you may want to contact TP-Link customer support or consider a replacement. In most cases, though, with the correct setup and placement, the Deco X90 will provide excellent performance as your Wi-Fi extender.