I have a rb 750gr2 that began to have problems a few months. When the temperature approached around 50 ° C it blocked ssh, winbox and web access.
Recently replaced this routerboard and brought the probelmatic to the lab.
I did the complete reset without default configuration, configured only one client dhcp to be able to update the routeros and firmware.
It happens that on any version of router OS I choose to download, after downloading it restarts itself and comes back with the same old version of routeros, in my case 6.38.1.
I also realized that I can't uninstall packages like wireless, hotspot, or disable them after reboot are active again.
I already changed the 2 capacitors of the board just in case, but it didn't change anything either.
Any other attempts before discarding this RB?
Thank you all