I don't see anything wrong in the front end. Except the fact that the guy who rebuilt it loves those silver colored caps (vitQ? or K-40-Y?). Healy. If you can lift one side of one of the DALE's you can get the value with a meter. Then solder it back in. Or just try with the meter and the resistor connected. You'll probably get the rest of the circuit involved too but it's a shot.