I am working on a Data East Maverick and the left flipper on occassion is sticking up during game play. This is normally after the machine warms up and has had a couple of games.

What I have noticed is, if I open the coin door during a game the flipper hold voltage (measuring just over 6volts) is on and I can see the left flipper twitching a little. The right flipper also has voltage applied at the same time although doesn't twitch due to the 2 flippers on the right hand side.

To date the following steps have been undertaken.
- Change coil diodes
- Try 3 different flipper boards (2x brand new)
- Replaced relay, Q80, diode, C47 / C48, D24 and R107 / R108 (resistors were reading low although were fine) on CPU.

Has anyone else seen this type of concern before and are there any tips on where to look next.

I will check that next. I did have a look and nothing stood out although will have a better look soon.

I have just checked the switches and they look fine.
I have noticed that this is only occurring in game play as I cannot replicate it in any test mode or attract mode.

As an update I disconnected the switches just to be 100% sure there is no switch issue.

Even with the switch disconnected I am getting voltage at the flippers and twitching on the left flipper.

I will continue to work through this and provide any further information.

Just a further update. I have tested the voltage at the coils and I am getting 1-8v in attract mode and during gameplay it is running around 6v which is enough to twitch the coil. I am also getting voltage on the right flippers although looks to be split across the 2 coils so it is not noticeable.
I am guessing maybe an issue on the MPU although will need to look at it.
As a note the led on the flipper board that lights up when the flipper button is pushed is not lighting up.
Has anyone else seen this issue before.