Frigidaire window AC unit remote not working

I have a FFRE08L3S10 model AC unit and my remote stopped working. I thought it was the remote so bought a Frigidaire replacement but still nothing couldn’t be the sensor inside the unit is bad and if so is there a part number I can get to find a replacement?

Apparently there aren’t many parts available for this AC. There are two parts to the remote control system. The remote and the control board, which doesn’t seem to be available anymore. Sorry it’s not better news.