Its no use, its doing the disconnections again. I think my Orbi has a hardware flaw. Its been only about a year. This is the most expensive and shortest lived router I have ever bought. I guess I will have to buy the ZenMesh.
Unlikely a hardware issue based on what you describe. More likely 1) your internet modem 2) bad network cable 3) device on your network causing havoc 4) a configuration issue.
#2 is easy to address, replace the cable between your internet modem and Orbi with a known good cat 5+ cable.
#4 is easy to address, factory reset, use default settings. Do not enable Armor, Parental Controls, etc. Do not change any default settings beyond SSID/PW. Do not import prior config. No IP reservations, etc. keep it as default as possible.
#1 is a bit harder to do anything about
#3 this is where is the issues usually are and depending on your network could be more time consuming to diagnose. Basically you need to:
* asses how often the disconnect happens (find some pattern of time so you have a window to gauge effectiveness of your change)
* remove and turn off/disconnect all network devices.
* reboot your Orbi to ensure there are no connected devices
* turn back on / reconnect a small number of critical only devices and test for the duration of your window of time determined earlier
* add back in 2-3 devices at a time, continuing to test until the issue returns
* when it returns, disconnect the newly added devices, reboot Orbi and add just one of the newly added devices back in and test for the window of time.. then the other.. etc. till you find the culprit.