Resistor Discoloration
The power scheme is not presented here but thinking I come to the conclusion that the 36V is pulsing. Otherwise C 100uF would not have been inserted, or at least of less value. In practice, this capacitor is involved in an AC circuit that consumes power at the charge of the capacitor, and this power is dissipated to a limiting resistor of 200ohm. And probably the power dissipation is at the edge as seen. If the power supply is done with a bridge rectifier (and even one half does not work) the pulsations will be (very) large, the capacitor will compensate them at the expense of a higher charge current which causes the resistor to overheat. What a paradox! One half of the bridge does not work and limiting resistor overheated!