good morning

My motherboard is giving me the code FF, when it gives this code the computer does not recognize the mouse or the keyboard and the system does not go up.

I changed the battery, the graphics card, the power supply, changed the slot RAM, reset the CMOS, but I did not solve the problem.

Days later I sent the computer to a repair center, the computer turned on asking for a date change in CMOS, everything worked fine, I returned with a computer to my house everything worked fine, turn it off at night and the next day did not work, FF code, I made several changes in hardware but nothing worked, two days later I turned it on and it worked ...

The motherboard is dying and it is for this reason that it works randomly ??

Thanks