Done some miles on my Premium Ghosterbusters since I got it a couple of weeks ago. I have something not right in the River Of Slime under the city. In between the three poppers is a big led flasher and mine isnt working. Actually I cannot remember if its ever gone. Anyway, I lifted the playfield and swapped the led bulb with another led bulb from the playfield that I new was working and still no joy. My question is this, in the service menu where do I need to be to test just this flasher?