Does this look like burn damage
You've got three 33 ohm  resistors in series there, (R1,R2,R64) someone did that on purpose, probably because they needed a higher wattage than a single resistor could handle. 

That sort of discolouration is fairly common where boards get hot. it does not necessarily indicate a fault. 

If the board gets too burnt it can become conductive, your board is part-way there. but I don't think all the way there.

Remove the resistors (R1 R2 R64) and measure the resistance on between the pads where R2 connected, if it shows less than 1 Mega ohm the board is damaged, if not the fault lies elsewhere.
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