Recently the router sometimes reboots itself. The log has many entries with the same time.
I changed the power supply, monitoring in zabbix does not indicate CPU high load or temperature, and there is no high traffic.
What are your tips?
The logs are suspicious: they all bear the same time stamp (precise up to single second ... and device needs much more than one second to boot up), so I'd say it was a single event (but logged many times).
Other than that: I suggest you to upgrade ROS on your device. There's a long-term ROSv7 now available (7.20.x IIRC) ... or stay at 7.19.8 (which seems to be version of choice for quite a few forum members as a very stable version). Don't forget to upgrade also routerboot (System -> Routerboard).
Thank you, but maybe this is a hardware problem with the capacitors inside the router itself?
See screenshot with https://www.youtube.com/watch?v=muCWX1NKgQw
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There's always possibility of hardware defect ... and yes, failing capacitors are often causing intermittent problems (which are getting more frequent as the state of capacitors degrades).
But there's a track record of bugs in software (and every software has it, so nothing special for MT in here) which get fixed with time. Hence suggestion to upgrade ROS to a known stable version (I mentioned 7.19.x which is a tad older than current long-term, but according to my own experience and experience of many forum users it is a very stable version ... meaning that if your problems continue even after installing the said ROS version, it means that problem is likely a hardware one).
I found two versions. Which option is better?
1 - 7.19.6 from https://www.mikrotik-software.de/download.mikrotik.com/routeros/7.19.6/
2 - 7.20.8 Longterm from https://mikrotik.com/download/routeros
option 2 is available with automatic updates.
Personally, I'd go with 7.19.6 first to see if reboots get away. As I wrote, 7.19.x was/is considered very stable, it should tell you something about nature of your problems.
This is the link on the official Mikrotik site, just in case you don't trust too much the (AFAIK perfectly fine) non-official repository:
https://download.mikrotik.com/routeros/7.19.6/routeros-7.19.6-arm64.npk
you will probably also need wifi-qcom:
https://download.mikrotik.com/routeros/7.19.6/wifi-qcom-7.19.6-arm64.npk
Generally speaking, take the link for a "visible" version on the site, like:
httpx://download.mikrotik.com/routeros/7.20.6/routeros-7.20.6-arm64.npk
and change (in two places) the version:
httpx://download.mikrotik.com/routeros/7.19.6/routeros-7.19.6-arm64.npk
I found an interesting file on the Internet with instructions for disassembling and testing Mikotik routers:
https://download.discomp.cz/MikroTik/Overvoltage/overvoltage_instructions_2024-02-29.pdf
There was excess thermal paste on the back side PCB of my router, which I removed (see screenshot from file).
I installed version 7.20.8 - so far so good.
off top - By the way, what's that switch on the front panel?
Does it duplicate the rear switch?
Because when I press it, I get log messages:
It's the WPS button:
The D53, C53, S53 and H53 series RouterBoards have configurable WPS button. It also works in the same way as reset button and mode button and executes a script
