A friend's Riverboat Gambler is having some problems when it powers up. It starts a cycle of the lift crank assembly on the ramp moves a little, followed by the left drop target solenoid energizing and all the controlled lights will go out and then come back on. I've also noticed that the +5VAC and blanking leds on the MPU board are solidly lit, and the diagnosis led is blinking. The diagnosis and the blanking led will go out when the left drop target solenoid is energized. I've reseated all the connectors on the MPU board and there is nothing that jumps out at me on the MPU board that looks fried. Now when I go into the adjustments and bookeeping settings, the solenoids stop there energizing cycle. Any suggestions on where to start to troubleshoot this?

So I fixed that problem by reseating 1J8 on the MPU board. Now the next problem is the game will reset shortly after I launch the first ball. Also the display is saying press advance when it is powered up. When I check the messages, it says wheel error, and I've reseated the two connectors on the back side of the wheel board without solving the error.

The fix was to replace the bridge rectifier on the power supply board, however that was after I recapped the board and replaced Q5 trying to track the problem down the schematic. The next problem was while all the solenoids work in test, most didn't work during gameplay. The problem solenoids were all of them minus the flippers, slingshots and pop bumpers. After I added a little bit of solder to the connector pins/bridge rectifiers on the auxiliary power driver unit board everything was working perfectly.

I'm fixing up a Riverboat Gambler for a friend and need to find out what size spring is used for the ball diverter assembly, part number B-13915. The instruction manual doesn't list it, but it shows clear as day in the diagram.

Unfortunately I didn't see the old spring when I went through the playfield cabinet. I ordered a couple of different sizes, so I'm crossing my fingers that one of them will work.

Thanks! I also have to replace another part that isn't listed that I later found out was the drive arm. I was looking at all the parts at Marcos and one of them was used in a bunch of other Williams games. I looked up the parts list for Adams Family and lo and behold I found that part as well. It is #A-14185.

Here's a tip if all of your GI on the playfield doesn't work and everything on the backboard interconnect board is working. Check the relay board, part number C-11998-1 under the back end of the playfield. I was fixing this same game and two of the pins on the 7-pin connector were crispy. I replaced the header pins, the connector and later found out the relay was toast to. Fixed all of that and the game is all fixed up.

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