TP-Link error codes and warnings
Match the exact device and display before troubleshooting. These independent guides begin with published manufacturer information and keep the safe owner checks separate from service work.
Routers & Wi-Fi
TP-Link Deco Solid Red Light: Meaning and Fixes
A solid red Deco light indicates an issue, often a lost internet connection. Check the modem, main Deco, and satellite in that order.
Read the guideTP-Link Deco Pulsing Red Light: Meaning and Fixes
On common Deco models, pulsing red means a satellite is disconnected from the main Deco. Improve placement and restore the mesh link.
Read the guideTP-Link Deco Solid Yellow Light: Meaning and Fixes
Solid yellow normally means the Deco is starting up. Wait one to two minutes before treating it as stuck.
Read the guideTP-Link Router Internet Light Off: Meaning and Fixes
The router is not detecting a working WAN connection. Test the modem, Ethernet cable, and router internet port in that order.
Read the guideWi-Fi & Smart Home
TP-Link Deco Pulsing Blue Light: Setup Meaning and Next Steps
A pulsing blue Deco light normally means the unit is ready for setup.
Read the guideTP-Link Deco Solid Blue Light: Setup-in-Progress Meaning
A solid blue Deco light normally means setup is in progress.
Read the guideTP-Link Deco Pulsing Yellow Light: Reset Meaning
On common Deco models, pulsing yellow means the unit is resetting.
Read the guideA nearby code is not necessarily the same code.
Confirm the model number and complete display in the official manual. If the code is missing, send us the brand, model, and exact warning.