NETGEAR Nighthawk routers Wi-Fi keeps disconnecting

The checks in more detail

Channels: most routers pick a 2.4 GHz channel automatically, but frequent lost connections or slow transfers caused by interference may be helped by manually changing the channel. Bands: higher frequency bands are faster but shorter in range, and a Wi-Fi 6E or 7 router's 6 GHz band must be close to the device; devices may roam from 6 to 5 GHz and not return, which is the device's behavior. Power: a router that keeps rebooting drops everything, so check the Power LED for blinking amber. Keep firmware current. If one device drops, forget the network on it and update its driver.

If all devices drop together, power cycle the modem and router. Note the times drops happen for a few days. Drops at the same time each evening point to interference or heavy use, while drops that follow a unit point to that unit. Change one thing at a time and wait a day between changes. If drops only happen on one phone or laptop, try it on a friend's network. A device that drops everywhere needs a driver or system update, not a change to your mesh.

Satellites placed at the far edge of the backhaul range often show amber during the evening peak and blue in the morning, so judge placement at the busiest time, not only at setup. A router placed on a shelf against an outside wall wastes half its signal on the garden, so pulling it a meter into the room often helps more than any setting, and turning the antennas away from the nearest wall does the same. Repeated drops on 2.4 GHz alone often mean interference from neighbors, and moving devices that support it to 5 GHz is a quick way to test.