I got The Pin working so it plays great (bad Cat 5 cable connection from the MPU to the node board resulting in an "I/O Error" message at boot-up), but I had no GI lights. That was due to no 6 vdc at the node board (there is only one on this machine). As nearly as I can tell, it is very difficult, if not impossible, for an enthusiast to repair the boards as there are no available schematics and the components are surface-mounted. From what I can gather, the Spike system power supply transforms and rectifies 120 vac into 48 vdc which is then sent to the mpu and the node board(s) to be further transformed and regulated to the necessary dc voltages (24, 12 and 6, I believe). With my node board, the 6 vdc for the GI didn't work.
I checked Marco, Pinballlife and Stern. Nobody has the board I need (520-5321-00 Rev C). Stern said they have committed orders from distributors which I take to mean they may or may not have more made. It seems that they really want the whole "The Pin Thing" to go away. Stern also told me that they have no schematics for the node boards (Bullshot! How did they design the boards to subsequently have them produced by a third party?).
In the end, I did a hack for the GI (which is completely on one circuit) wherein I wired a PC power supply to the on/off switch, modified it to start when the a/c voltage was present, and connected the 5 vdc output to the GI circuit. I mounted and firmly attached the ps box to the wooden crossmember at the bottom center on the inside of the cabinet. If you didn't know about the hack, you wouldn't know the game isn't functioning as it should from the factory. It boots normally, the GI lights immediately and it plays great. All will be good until the node board eventually shoots craps completely after which time The Pin will be a 150 lb paperweight due to a lack of a replacement board. What a shame.
BTW, the game is actually very fun. I have had 50 or so other commercial machines, and this one certainly plays better than the early SS games and many of the late 80s games. It doesn't have any ramps or habitrails, but instead has a variety of lanes to shoot and a 3-ball multi-ball. Not a bad pin if you can pick one up for $1500 or less, with the wild assumption that you will be able to keep it running! In my opinion, it was a good idea killed by a bad retail price point, poor execution and a total lack of support.
P.S. The game can be serviced from underneath by removing six screws and a piece of hardboard to gain access. The PF doesn't lift to allow access while standing (presumably, it was to be so reliable that it would never need service?). The whole process is akin to lying underneath a car while alternatively swearing and drinking beer; and occasionally turning a wrench.
(The green painter's tape in the pics is to hold the translite in place until the on-order tempered glass is done. It was broken by the previous owner.)
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