My 2013 Mac Pro won't turn on

I have a 2013 Mac Pro that won't turn on. It started doing unjustified reboots, then it was hard to turn on, it took several minutes to turn on, and now it does not turn on, the power button is the only LED that does not light up, but it seems that it is on because it seems that you can hear the fan spinning. I am going to take it to an Apple technical service for repair, but I would like to know if it is the symptoms of the damaged graphics. Because if so, I will not repair it and sell it for parts.

These symptoms, can they also correspond to the damaged power supply? I have already done everything, in addition, it was once in the technical service when the ignition began to fail, and they did not find anything.