Monday 4 December 2017 at 11:59
I have the same problem with Gorgar. It usually happens when the flippers are activated almost simultaneously. I haven't isolated the problem, but I do go into the backbox and wiggle the connections on the power board and the right side of the MPU (from Rottendog). This usually clears up the issue ...
Source: http://pinside.com/pinball/forum/topic/williams-firepower-randomly-drops-into-attract-mode#post-4106283