Swords Of Fury owners Club Fans Also Welcome

Hey there guys, joined the club a few weeks back and loving this amazing game!My one question is about the intermittent drop targets on my game, they register every so often and there's no rhyme or reason to it. I'm new to system 11 and I've checked the connectors under the target bank and on the board in the backbox where 'playfield switches' connect to and everything seems in check, same goes for cold solder joints in these areas. I've read how some people have reflowed the power supply connections but I'm just unsure of where to check for this - which board and which connections in particular? Any help would be greatly appreciated
Cheers