Hello everyone. I’ve searched and searched for the answer to some of these questions, but I’m not familiar enough with the inner workings of a SS machine or the nomenclature to identify what components I’m dealing with and how they work. I apologize for asking questions that could be answered with the search function. I really don’t know what keywords to search. I’ve tried “Stern Quicksilver” and “Stern display” but I haven’t found the answer to my issues. I just picked up a partially working Quicksilver. When I first brought it home, the 7A slow blow fuse had been replaced with a 10A fast blow that was blown badly also the large plug at the base of the bridge rectifier board is burnt on each end. I replaced the blown fuse with the correct replacement after which, the machine powers on. The displays for player 1 and 2 both show some sparkly artifacts along with digits that come and go. The player 3 display is missing the bottom segment on all seven digits. The player 4 display only shows the first digit most of the time but will occasionally flash all 7 digits. I haven’t taken anything apart yet, but I will reflow all of the solder joints on those display boards to see if it changes anything.
Now the weirdest part (at least weird to me). This happens on all displays and all digits, the individual numbers will randomly jump back and forth by two digits. A 0 will randomly turn to a 2, a 1 to a 3, a 2 to a 4 and so on. When a credit is used, the score display will jump around between 00, 02, 20, or 22 before the game is actually played. The credits remaining, ball in play, and all four score displays do this randomly on all digits but not at the same time. It might show the wrong ball in play but the score is correct or vice versa.
Also, none of the playfield general illumination is working. The top half of the back box illumination is out as well, though the lower half works fine. Is that probably related to the bridge rectifier board being burnt?
Finally (for now), as soon as a credit is used, there is a loud repeated sound that may or may not be intentional. It’s as if a switch is stuck somewhere and the machine just replays that sound over and over. I’ve watched several videos of this game being played on youtube and haven’t heard the same repeated sound. After looking at the manual, I’m wondering if this is the “Background Sound” mentioned at switch 14 on page 9 of the manual.
I’ve attached a picture to this post. You can see that the bottom segment of each digit of the 3rd player display is missing. The 4th player display only shows the number 7. Also notice it shows ball "30" in play. I will post a video or two in the comments below in order to describe exactly what the video(s) is/are showing.
Again, I apologize if these are commonly asked questions.
Thanks for the help, John