Just picked up a BK2K after being without one for years and truly regretting parting with mine. Anyways, the machine I picked up has an issue where the three bumpers on the upper playfield don't work. I've put the game into test mode and the coil test doesn't fire any of the three. I restarted test mode and checked for voltage at the coil and didn't find any voltage. (I also tried grounding out the tab of Q8 to test the AC switch). I've pulled all fuses and checked, 0.00ohms on each fuse.
What else should I be checking? Every other coil seem to work. Just not all three bumpers.
(Side note, when I first picked up the game, two of the three bumpers would work, and one was locked on whenever the game was playing. that lasted about a day, then none of them worked, not even the previous locked on one, which is now just dead.)