TP-Link Deco M4, E4 and W2400 lights: what each colour means
8 light states of the TP-Link Deco M4, E4 and W2400, from TP-Link Deco’s own page What Do Deco LED Colors Mean? (Deco LED Light Colors Explained). It has one light on the unit, solid white (not green) when it is registered and all is well.
White, solid
Deco is registered and all is well.
TP-Link Deco’s page gives no step for this light.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
White, pulsing
Deco is upgrading firmware.
TP-Link Deco’s page gives no step for this light.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Yellow, solid
Deco is starting up.
TP-Link Deco’s page gives no step for this light.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Yellow, pulsing
Deco is resetting.
TP-Link Deco’s page gives no step for this light.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Blue, pulsing
Deco is ready for setup. A blue light that won’t move on can mean the Deco is stuck in setup mode.
What TP-Link Deco says to do
- Stuck on blue: follow TP-Link’s ‘how to set up your Deco’ steps again.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Blue, solid
Deco is setting up.
TP-Link Deco’s page gives no step for this light.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Red, pulsing
Deco is disconnected from main Deco: the unit has lost its connection to the main Deco.
What TP-Link Deco says to do
- Reboot the unit and verify your Internet connection.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Red, solid
Deco has an issue (a general issue).
What TP-Link Deco says to do
- Reboot the unit and verify your Internet connection; TP-Link’s ‘Deco units showing offline’ article has more.
Source: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) (TP-Link), checked 2026-09-29.
Other TP-Link Deco routers
The same colour can mean something else on another TP-Link Deco router, so check the name on your router’s label.
Sources
TP-Link Deco’s own pages only, read on the date shown. Nothing here comes from third-party router-light sites.
- TP-Link: What Do Deco LED Colors Mean? (Deco LED Light Colors Explained) — Deco X and BE series and most Deco models; Deco M4, E4, W2400; Deco M5, P7, M9 Plus (FAQ 1464, last updated April 17, 2026). www.tp-link.com Checked 2026-09-29.
Find a light by colour on any provider’s hub or maker’s router →