hey all, new to the forum but have been collecting pins for quite a few years now. anyways i just purchased a williams high speed pinball machine. have always loved this machine since i was a kid and finally pumped to own it. its currently only partially working tho, the 3 pop bumpers at the top and the 2 lower slingshots are not functioning. visual inspection i found a fuse blown in the backbox, the 2.5a special solenoid fuse. i replaced it and turned it on, the top left pop bumper coil pulled in and the fuse immediately proceeded to get hot and blow. curious what the issue could be? does the pop bumper coil need to be replaced? any help is appreciated. thanks

ok then i should also add that when i turn the machine on it says adjust switch 23 right bank yellow. any idea what im looking for here? im assuming a yellow wire on the right bank? is this on the playfield or somewhere in the back box? all of the yellow wires on the playfield seem to be for lighting

ok awesome, i found it. the diode wasnt making contact onto the middle pin of the switch. just fixed that and im not getting the error anymore. still having the issue with the solenoids tho

ok so let me get this straight. if i cut one of the wires from the solenoid that locks up and replace the fuse the game will function all except for the one pop bumper? and if i replace those 2 transistors i should be able to reconnect it and be fully functioning?

ok i did it and the game is functioning all except the one pop bumper and it seems some of the flashers arent working either. but it is playable. where would i find the replacement transistors? and how would i check the coil itself? the kickback coil seems to be weak if it works at all. anyway to test it or should it just be replaced?

ok so i was able to go through all the bulb and flasher test and fix all the burnt out bulbs. i then went through the coil test and was able to get all but the one disconnected pop bumper working. turns out there was a loose connection on the kick back coil. at this point the game is working a lot better than when i started, my only 2 issues now are the one pop bumper and i have one display that is dead.

how do i find out what the number of the transistor is? i have located them both on the main board but im having trouble cross referencing the number on the transistor itself to the ones they sell at marco. lastly where would one be able to find replacement displays for this machine? i bought some a few years back for one of my older em bally machines, it was a diy kit that you solder together yourself. would love to find the same thing for this williams machine

ok awesome. those parts are very cheap, so im guessing my best bet is to replace them and then see if it fixes the issue? i tried swapping the display and it is definitely dead, tried reheating the solders and no difference. i think i might just buy the replacement upgraded pinscore ones from marco with my electrical components

ok so i finally got the parts in and i have swapped out the 2 transistors, i put the board back in and tried the game and it still works the same. im going to change the diode on the pop bumper coil and solder it back into the circuit and test. is there anything i should do before this?

how can i do that? like i said after i changed the transistors i turned the game on and it functions as before. still have the coil disconnected. should i re connect it?

ok, i just tested the resistance and it is very high, does that mean im good to reconnect the pop bumper?

ok, i tapped the wire and it didnt activate, i think im ready to put it back together. decided to rebuild the pop bumpers as most of the plastics are very brittle and cracking. ill report back when i get it all together. thanks for all your help

just finished rebuilding my pop bumpers and got it all back together and everything is working as it should. pumped to play some games! thanks again for all your help