1) Right burners spark and ignite just fine.
2) Left burners will only spark when either of the two right burners are turned.
3) Left burners will not spark when either of the left burners are turned on.
4) Left burners will not light up even if they are turned on at the same time as the right burners.

I have replaced the "Spark Module, 4-Point Gas Re-Igniter with Flame Rectification" but that did not fix the problem.

Question: What could be wrong? Should I replace the Controller?