Hello,
I'm new to Pinside and at a complete lost of what's causing my problem. My Williams "High Speed" has been recently having problems with the Left Upper and Lower switches on the hideout ramp. When I run a switch test it's not recognizing either switches as well has the shooter lane switch, and the engine rev when either flipper is activated. All other switches seem to be fine. All the coils are also firing as well as the left hideout coil when I run a coil test. I have checked all the fuses in the head of the machine and they all test good. I don't see any lose wires or anything else that might be the culprit.
I have tried to find anyone in the central Ohio area that does pinball repairs with no luck. Any help would be greatly appreciated.

Thank you for the response. I tested continuity on all the wires to the affected switches and they all test good.

Thanks, I'll take a look tonight to see if that's the culprit. I've owned this machine for nearly 25 years with little to no trouble up until now. I appreciate the advice, I really hope that's the cause of my trouble because I've checked about everything else I can think of.

Thanks again for your help. I recently replaced the entire left flipper assembly before the trouble started. Do you think that could have anything to do with the trouble I'm now having? I'm getting ready to remove it, and reinstall it incase I have a cold solder joint or something. The left flipper is working great, but I'm wondering if maybe it's connected somehow. I'm also trying to find which large plug you mentioned in your earlier post. Does that plug attach to the CPU board?

Thanks again

Thanks again for your help. I'm hoping to go over everything you suggested this weekend. I really do appreciate your help because not knowing the cause is very frustrating.

I re-wired the left flipper assembly and now I have a new issue. When I run switch test I'm getting message saying problem with 11 (Center Trough) and 12 (Right Trough) errors, and still having the original switch issue. I'm going to need to find someone that does repairs in central Ohio because I'm concerned about possibly doing more damage because my eyes aren't as good as they once were. Do you know of anyone in central Ohio that might be able to assist me with this?