Red Dot focuse stopped working

My laser has been working flawlessly until yesterday. All of a sudden my red dot framing light stopped working but the laser was able to engrave but then the engraving laser stopped working. I have not changed any settings at all. The chaise cooling fan and fans on my laser source are running but the fan on my 24v power supply is not running. When I checked my voltage on my 24v power supply I was getting 24.1 Volts. Not sure what to check now I’ve change out the Controller switch didn’t fix the issue in reading in a previous post it may be this cable however int quite sure of location and cable part number or type