Issue with my mikrotik rblhg-5nd : crashes randomly after a power outage

I’ ve got an issue with my rblhg-5nd. It runs on v6.49.15(stable).

It works well but after a power outage, it stops working and can’t provide internet. Then after a while, it backs to work.

Works for 4-5 hours, then again stops working. It comes as a loop.

I reinstalled v6.49.15, but still same problem remains. Works well until a power outage happens.

there are some messages:
1.router was rebooted without proper shutdown
2. kernel failure in previous boot.

First thing to try: a different, known to be good, power adapter, power adapters do age and power outage is a slight shock for PAs actually. Also try with different PoE injector (but this is a bit less likely cause of problems)

Thanks for the answer.
I did.
I replaced adapter and PoE. But didn’t solve the issue.
Actually, it seems more like a bug or hardware problem. Because after reinstallation of v6.49.15(stable). It works for up to 10 days but another power outage occured and causes the issue again.
I contacted mikrotik support for the problem, sent them supout file but didn’t get any answers yet.
I’m waiting. I hope it won’t be a serious problem. I use this model only for one year and didn’t expect to have serious problem this soon.
Maybe I send it for a complete checking for hardware damage or software bugs.

The issue didn’t solved. I sent the device for a complete hardware checking.

It wasn’t a software issue.