Hi all,
My STTNG has some attitude problems (random ball searches during game) I have changed the ball thrugh boards. also the wiring loom to both guns.
The game still gives me a slight headache and i started to go thru all switches. the under gun switches doesn't register in switch test (both left and right) but they register when doing the gun motor test. (open/close shows up on DMD)
anybody who can point me in the right direction?
which IC controls those switches on MPU, not U20?
Thanks a lot as always

thanks, so (of course) the switches should register in switch test, right?

interesting. im not going to keep you awake unless you are burning to answer all my questions.
all the non registering switches are in column 9. column 1-8 are controlled by U20 (which is socketed on my board and was changed yesterday BTW) column 9 is labeled "Q11 J5-1" whatever that is?
Sleep well

Thanks Rudy. after reading up on pinwiki, it looks like those 4 switches in question are not included in the regular switch test but tested with the guns, and they register fine there.
thanks a lot for your help
im sleepy, semi drunk, ultra tired and i need to clean up the bar and go home.