TP-Link Deco X55 the main Deco does not pulse blue during setup
Cause 1 of 2The LED on the main Deco is not pulsing blue. Source: LED on the main Deco is abnormal: LED is not pulsing blue, p. 1
First checkPress the Reset button on the bottom of the Deco for one second, then release it. The LED turns yellow.
Causes and checks
The LED on the main Deco is not pulsing blue. Source: LED on the main Deco is abnormal: LED is not pulsing blue, p. 1
- Press the Reset button on the bottom of the Deco for one second, then release it. The LED turns yellow.
- Wait 2 minutes until the LED pulses blue.
The LED is off. Source: LED on the main Deco is abnormal: LED is off, p. 1
- Change the power adapter, the outlet, or both.
- Try the other power supply from the packaging.
All 2 causes checked. Contact TP-Link Technical Support.
Service
If the checks above do not clear it, contact TP-Link Technical Support, tp-link.com/support. Contact Technical Support page at tp-link.com/support, and the Help center of the Deco app. Source: About This Guide, More Info, p. 1
Other Deco X55 problems
- The Deco app shows an error while setting up the main Deco2 causes in the manual. First: the app reports that the Ethernet cable is not connected (Unable to complete WAN setup).
- A satellite Deco does not join the networkThe app shows Failed to Add This Device or Couldn't Find Any New Deco while you add a satellite.
Sources
- User Guide, AX3000 Whole Home Mesh Wi-Fi 6 System Deco X55 (EU, V3.0). TP-Link Systems Inc. Document 1910013645, revision REV3.0.0, 2024, 16 pages, en-US. static.tp-link.com (PDF). Retrieved 13 November 2026.
- What Do Deco LED Colors Mean?. TP-Link Systems Inc. Document FAQ 1464, revision Last updated 2017-01-17, 2017-01-17, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- TP-Link Deco Solid Red Light: What It Means and How to Fix It. TP-Link Systems Inc. Document FAQ 3672, revision Last updated 2023-06-15, 2023-06-15, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- Main Deco Failed to Complete Setup. TP-Link Systems Inc. Document FAQ 2239, revision Last updated 2023-07-12, 2023-07-12, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- How to Reset Deco: Reset or Reboot Your Deco Whole-Home Wi-Fi System. TP-Link Systems Inc. Document FAQ 1457, revision Last updated 2026-10-08, 2026-10-08, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- Deco Wi-Fi Settings. TP-Link Systems Inc. Document FAQ 1591, revision Last updated 2026-04-17, 2026-04-17, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- How to Update or Upgrade TP-Link Deco Firmware (3 Methods). TP-Link Systems Inc. Document FAQ 1599, revision Last updated 2026-08-24, 2026-08-24, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
- Error When Adding a Deco Satellite Node: How to Fix It. TP-Link Systems Inc. Document FAQ 1447, revision Last updated 2026-05-07, 2026-05-07, 1 pages, en-US. tp-link.com. Retrieved 13 November 2026.
Page numbers are the numbers printed in the manual. Where this page and the manual differ, follow the manual.