Hi everyone,
sorry for beginner question, but how to check if hAP ax3 wifi is broken?
The router was working all fine, then wifi signal stopped for both 5ghz and 2ghz. I can log into routerOS via WiFi but there is no internet signal.
Tried to reset settings from OS and running quick setup with no results.
How could I verify if hardware is faulty before sending back to warranty?
Thank you.

Well if you can log into router via wifi but no internet then i doubt it's hardware problem with wifi.

Did you try to set router to default configuration ?

wifi signal stopped for both 5ghz and 2ghz. I can log into routerOS via WiFi but there is no internet signal.

all clear.

I tried to Reset Configuration via routerOS, with "Do not Backup" checked. Same results, can connect to wifi but no internet.
When I plug the Ethernet cable directly into PC or old router, everything works.

So it's time to export configuration so we can check if everything is ok.

When you connect your PC via cable to the router do you get internet ?

No, no internet from router to PC with cable. Tried all ports 2-5.
LEDs are lit by the ports, but the LED for port 5 is noticeable brighter than LEDs on ports 1-4.

I attached supout.rif file (zipped as forum does not support .rif)

You need to export your configuration in terminal by using command export file=anynameyouwant, save that document and post it here after you redacted sensitive information.

Please see the .txt file in the attachment.

That is default configuration as far as I can see. Can you ping for eg. 8.8.8.8 ? In IP->DHCP client can you see if your device get IP address from upstream device ?

When I click on defconf, ether1, I see Status:Stopped invalid.
When I click Renew, I get: Couldn't perform action - interface is not running (6).
Under Status everything is empty.

Ping to 8.8.8.8 timeouts with 100% packet loss.

So you got a problem with the connection between AX3 and your ISP modem.

What sort of device is that modem ?
Already tried connecting a PC instead of AX3 to see if that works ?
Already checked cables ?

OP said that when PC or old router is connected everything is working.

Strange it says invalid... If device can't obtain IP address then status would be searching...

Can you try to delete and then create new dhcp client ?

I disabled the default and created new one, but it also said the same- stopped: invalid

Do you have anything in logs when you connect upstream device to the ax3 ? There is one thing you can try, try to assign static IP address to your ax3.

Also, don't disable existing dhcp client, delete it and then create new one. It's possible that now you are getting invalid as you have two dhcp clients on the same interface.

A bit more invasive, try another port as WAN.

Only other option I can think of is netinstalling the device.

I wanted to follow up on the issue.
I returned the device for the warranty service and they declined warranty because:
The device was found to be damaged by overvoltage, the manufacturer has rejected the warranty.
The voltage drop between the Ethernet transformer is outside the acceptable range -
0.03V. Allowable (0.35V to 0.39V).

The router was connected to two other routers via cable, the main router from Baltcom --> D-Link --> hAP ax3 , they both are in order, no other electronics are damaged in the house, no circuit breaks went off when the hAP ax3 went offline. Isn't there any overvoltage protection for the hAP ax3 ?
Does mikrotik have service repair?