Ok.. I picked up a 300 pretty cheap. It was stuck in a reset cycle. I thought I should be able to fix this! Well nope... I did get it out of reset. I actually was able to get it to kick a ball out and play. Scored fine but then on drain it stayed on player one ball one and would continue u on that way. I started cleaning and adjusting the switches. Now when I turn it on it kitsch the ball out but nothing has power. No flippers no nothing. I have read thru pages after pages of em tech to try to muscle thru this but I'm at a loss. Anyone lend a guy a hand that seems to no nothing about EM pinballs?

Yes..I turn on the machine and the ball kicks out but the play field does power on. The replay button on coin door does nothing. If I manually flip the replay switch under the play field it seems like it resets but nothing.

HowardR I'm doing my best but I'm not great at schematics. I can't find the switches

I think you may be on to something. The credit switch says 9 in the half moon but on the back it seems to be stuck. I'll link a pic

image (resized).jpg

Yes. I can find those relays. Side note. When I turn it on now it just continues to run and it seems like the W relay 2nd chute relay just keeps flipping

Ok. So I cleaned and adjusted the tilt hold, game over and ax relays. Now I turn on the machine and backglass lights up but that's it. Replay on coin door does nothing. If I trip the start relay it runs for 3 secs and stops

Ok.
1 yes I found the switches
2. No I have no idea

Maybe I bit off more than I can chew. I was ok with some solid state repair and I did get my 1968 Williams 1 player EM running but this one seem awful.

Ok a little update. When I switch the machine on the backglass lights up. I am able to coin up and it adds credits on counter. Replay button on coin door doesn't work. It I trip the start relay the game goes thru the reset but the ball does not kick out and the playfield stays dark. I know it doesn't sound like much but I couldn't coin up before so I count it as a win. Any ideas on where I should start next?

Ps: I'm sure if this is some but the 1st ball relay is staying energized and humming a bit.

Ok. It's been awhile but I did get the new coils and installed them. Now I power on the machine, it resets like normal but the motor on the cabinet bottom will not stop spinning. If I manually disengage the ax relay the motor stops. It kicks out a ball the playfield is fully powered. I can play the ball (flippers even work) then ball drains it kicks it back out but never advances the ball count. I can play 20 balls. It scores fine. I think I'm close ( I hope I'm close). Anyone have any ideas?

P.S. the start button on coin door still doesn't work. I have to start with engaging the the start relay.

Just a follow up for anyone following this. I found a wire off on the stepper unit in back box. Soldered it and bam! I have a fully working gotlieb 300!!! Thanks everyone for all their help!