I have just replaced a number of blown transistors on the switch matrix on a stern high roller casino. As a result I now have all the switches working but now there are still a handful of switches that trigger 2 or 3 other switches on that column when a single switch is triggered in test.
This occurs in around 3 of the columns. This machine had switch issues when i got it. Now most of the issue has been resolved but I am not sure where to look next for this problem.
Any feedback on next steps would be great.
Thanks in advance.