Is this a 4R9 resistor or somthing else?
I'd guess at a 47 ohm (the violet band would be right over the hottest part of the body, so prone to discoloration). The resistor is on the mains input side of the board, upstream of the voltage suppressor (RV1) so is likely a fusible type intended to fail reliably open circuit with  the suppressor clamps the input down. As such you're not likely to be able to measure it.

Here's  A possible match from Vishay.