People will be better able to assist you if you provide the name of game that you are experiencing difficulties with

Still best to include it in your post as it makes it easier for someone reading it to help you. My suggestion is to check the flipper button and EOS switch on the right flipper, make sure it's clean, adjusted properly and registers consistently in switch tests. When it happens does the upper flipper do the same or is it unaffected?

if it’s randomly happening during gameplay will the right flipper change mode selection, or move lanes, or even show the status report without the flipper flipping? if so try adjusting the flipper button switch. problem could be there. even if not take a look there. i had a similar issue on my tspp and the switch connection point at the flipper button was getting stuck together. good luck fixing joe!

MJR

Have you reseated driver board connectors? Just had nearly the same issue on WOZ recently and this solved it.

When it works, do power and hold both work, or only the power stroke and then it goes limb on hold? Does the power stroke always work or only sometimes? Not really sure from your description.

Check the solder tabs on the right flipper cabinet switch.