what does it do in active switch test when the ball is in the shooter lane and you shake the machine a bit?

Not related.

The first is the witch. Make sure both switches are adjusted correctly. As Surfsled said, switch test and then thump around. It will show which one is too close. Then stick a piece of paper or something in them and thump it around again (just to prove it isn't anything else). Finally adjust the switch so it doesn't happen.

As for the launch, yes, if a ball is in the shooter lane and you activate switches, the game thinks there is something else going on and will launch it. As far as I understand it, that is expected behavior.

i think its dedicated switch test.

Matrixed Switch Test.

LTG : )

mine was doing the exact same thing and also during game play it was registering hits. Look at the connections on the switch and I guarantee one of the contact leads is touching another one. Mine was bent upon delivery and once I separated the contact leads from one another it fixed the problem. Hope that' the fix.

mine doing this now, what to check? thanks