Hi,
How do I determine if my RT-AC68u is failing and should be replaced?

Making any changes to the wifi settings( main, guest network) would cause the router to reboot/crash. Sometimes it would reboot/crash right after the applying setting go to 100% sometimes it would do it later randomly(e.g.5mins, 20mins later)



Current troubleshooting that I have done so far
1. Update the router firmware to the latest firmware
2. Perform a hard factory reset on the router and manually set up the router again

1. Got it since March 2016
2. Currently having a usb fan drawing the heat away from the router


1.Is there a specific way to test the power adapter?

2. I have usb fan drawing heat away from the router

, so far been running the router a week with nat acceleration disabled and I don't see any crashes when making any changes to the wifi settings

When the issue occured, nat acceleration was enabled


But I belive, disabling nat acceleration wouldn't be counted as a permanent solution?