my Twister has been giving me fits lately with an odd flipper problem you can start a game & they work but once ball goes up the shooter lane one or both stop working or only work intermittently its really strange you can hold one down & see it pulse just a little bit try to play & they stop then work then stop again any help would be much appreciated as always BTW I love Pinside

Thanks LTG !! so here is what I found checking those switches so far .... when I went into switch test mode it said the only active switches were the 5 on the ball trough I then removed all 5 balls & restarted switch test & had no active switches, I then put one ball in at a time & each switch registered as active once a ball came to rest on it .... I did re notice , as I had noticed this in the past that there is a possibly hack of sorts on this machine , on the ball trough there is a green wire not factory that someone has soldered onto the first trough switch to the far left & it runs up to a connector in the back box looks like that the connector they used MAY have been blank originally ?? what should I check next ? attached a few pics.

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Thanks LTG!! update: ok so I disconnected that connector & tried to play a game and it says 5 balls missing so unplugging it affects that , here is what I found on voltage test green wire/red tracer has 6 volts on end coming from playfield , the added in aftermarket green wire soldered onto the trough switch has 7 volts on end coming up from the switch & the connector end inside the back box only has one connector in it & that end that is currently connected to the added in green wire & it has 5 volts on that end / so we have a 7 volt connection from the trough switch going into 5 volts in the backbox ?? does not sound like a complete circuit to me ? because it has voltage on both ends ?? side note this repair/hack added wire was in machine when purchased and since then the driver board has been replaced but that was several months ago & problem did not occur when board was replaced it just happened recently ??

Thanks! will check out all that as far as connections go & etc.. ....... & for the enthusiasm regarding Twister I dig it too

gave up & took it to a tech. he rebuilt the magna board & reflowed & repaired some other connections & it seems to have fixed everything .... playing great now