Car Overheats quickly- diagnostic is power to the engine fans

This is son's car and he has 2 years left of grad school. He sank the last of his savings into the car in the last year-part of that on overheating issues. Car has new radiator, water pump, thermostat, and fans work when turned on by shop manually. They say they don't have expertise for electrical repair and we need to have towed to recommended shop for further evaluation on fix. They mentioned that it might be "flash-drived" or replace with non-new part but we suspect this is part of the main motherboard? Which cam under discussion when we noticed the dash functions going in and out.
Tie rods were replaced in last 6 mos too. So, we are once again at this junction about repairing or replacing with very limited funds.
Any thoughts on the electrical problem and advice on whether once again to repair? We know this car was a POS new.