Pachislo Slot Machine Manual Japanese Skill Stop

Pachislo Slot Machine Manual Japanese Skill StopManual

Hello! New to the forum. Just got a Magic Pulsar Slot Machine and it has an issue where the reels wont stop spinning after you put the coins in and pull the lever.
The 3 buttons on the front of the machine do not light up, but if you press them the red indicators on the board inside the machine light up so it looks like it's sending the signal. The reels start to spin but never stop. The far right reel tries to stop and stutters, but then goes back to spinning endlessly until I reset.
Any idea on what the issue may be? I'm good with wires and electronics, but am new to slot machines so I'm not too sure where to start.
Here is a video of exactly what it does:
https://www.youtube.com/watch?v=7fGJH_VGJ4I
Thank you to everyone who helps!

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