yep flipper goes back up when turn on,
so it was going up when you pressed the start button?
i thought you said it was going up when you turned the machine on as per the above quote 
if it is only going up after you press the start button then it is an opto / flipper button board fault.
These GPE boards can be a bit flaky - they use hall effect sensors and a magnet to detect a switch closure - this was done to cicumvent a recently expired patent held by the WMS licence holder. The design works well most times but can cause some issues as the OP has found.
These WMS patents have stiffled Pinball for 20 years as the rights holders have done little with them apart from prevent certain parts from being made. One leacy is boards like this that are starting to cause issues but we are fortunate in that the patents are all expiring over the next year or so and cannot be renewed.
