I am starting this thread to document repair of various modern Stern SPIKE node boards.
Information and pictures that you may be able to add is greatly appreciated.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
https://www.youtube.com/c/ChrisHiblerPinball
http://www.PinWiki.com - The Place to go for Pinball Repair Info

This board seems to be unique to BM66.
It's function is to rotate the joker figure and perhaps field switch closures.

Q5 was visibly damaged.
Upon removal of Q5 (lower left, a 2N7002 dual N channel FET, https://www.nexperia.com/products/mosfets/automotive-mosfets/2N7002PS.html), diode testing U27 indicated a short between Vcc and GND. Since U27 drives Q5, it seemed reasonable that U27 would be shorted. However, upon removal, diode testing of the pads and other components, still indicates short (.055) between Vcc and GND. Diode testing U27 once removed indicated normal readings. Somewhere on the board, another part is damaged. Without schematics, this is going to be a tough repair.

The BM66 manual contains no schematics.
I've scoured the web and found no schematics.
I plan to call Stern to see if they can send schematics to me.

BDEECD3B-FD2B-4FB3-89B2-92F0AD07629A (resized).jpeg

OchoFosho ,
It was a good idea to take the board to someone with the ability to deal with the physically tight position of that voltage regulator. That part has an "exposed pad" under it that is soldered to the PCB. It might take quite a bit of heat to remove that part.
--
Chris Hibler - CARGPB #31
http://www.ChrisHiblerPinball.com/Contact
https://www.youtube.com/c/ChrisHiblerPinball
http://www.PinWiki.com - The Place to go for Pinball Repair Info