I just picked up a Gravitar. The monitor needs to be repaired (Waiting on Parts). The game powers on and I have 4.97 V at the main PCB. The dip switches are set for free play. The 1 and 2 player start buttons are flashing. When you press either start button, nothing happens. I took the game out of free play mode and when you insert a quarter, the credit sound plays but you still cannot select 1player to start a game. Edge connector looks great and wiring between switch and edge connector checks good. I am thinking that it may possibly be the buffer at N9 which is a LS224. Both start buttons go to this buffer according to the schematics. Just wanted to see if any of you Atari vector gurus had any input. Thanks!
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