I am trying to figure out if I my device is bricked, after flashing newest 7.1beta4 (drag and drop to file in winbox + reboot) from version 6.48.1 my device stopped responding at all.
Booting procedure seems fine, I press and hold reset button, plug the adapter, wait untill LED labeled "usr" starts flashing and then release. After 3-4 seconds the "usr" led goes off and nothing happens. My hap ac2 won't give me a DHCP address or it won't even show its mac address in arp tables (After pinging 192.168.88.0/24 subnet + old config subnets). Strange enought it shows active links on ports just fine. Tried every combination of resetting it to factory defaults, 30-30-30 method doesn't work, official way of resettings seems to exist but no effect, there is no jumper on my routerboard (Or its the one where button is connected).
Seems like L2 is not working after failed update on my model - winbox / netinstall won't answer.
Tried three different NICs, two PC's, Windows/Linux OS no difference. Wireshark shows only DHCP client service asking for lease + some windows protocols packets
Should I throw it away or there is someting I should try?
Thank you in advance for any ideas.
UPDATE 1 (13.02.2021)
After couple power cycles, trying netinstall NIC is showing around 2000 Tx Packets and 0 Rx (I've been connected only to hAP ac2). Most likely the device is dead after upgrading.