It’s more or less normal for the resistors to be hot. If the diode was shorted it would pull down the 5v from the power supply.
If you have no light on the CLC, make sure 5v is above 5.10vdc on the board, across the diode is a good place to read it, there is not more than a few millivolts of AC on the 5v. If that is good, it’s either the CLC or the software.