carver heater not ignighting?

the carver space heater in my lunar motorhome will not ignite there is no spark or any sound of a spark coming from the unit and no blue flame in small window I cannot locate any battery that may need replacing there appears to be a small printed circuit in the bottom left corner of unit with two very small plastic blocks with wires attached pushed onto printed circuit are these wires the power feed for the igniter instead of battery power