sounds like something to do with the reset bank??
is it seated all the way down? chk all relays inside for proper lift/drop action.

You're sure the inlanes that advance the sequence and score 300 points are good?

Scoring 300 and the matrix going to O leads me to believe you've got an issue with those switches, or something is not right on the matrix advance unit.

The game should not advance to ball 2 though unless the outhole switch is made.

Hi burnt_finger +
strange behaviour - I looked up in the ipdb-schematics. Yes, the Relay-Bank should not reset more than once - I do not know - I am guessing: The multiple "Reset" of the Relay-Bank is an "Side-Effect" of the fault (?).

Do not spend hours (as I am guessing) - have a look at the Coin-Relay - look at the relay and start a game - the relay shall (and most likely does) pull-in --- BUT it shall quit pulling after one Score-Motor-Turn of 180 degrees / half a revolution.

See the JPG - the Coin-Relay is feeded electricity - Coil pulls, relay actuates (pulls-in) and among other Switches: closes (encircled green) its Self-Hold-Switch. See the "Red stars" - the Game-Over-Relay shall not pull - so switch is open / the Ball-Unit shall be resetted so switch is open.
Then towards the end of the Score-Motor-Turn: Score-Motor-Wheel "5" shall open its switch AND the Coin-Relay must let go (quit pulling). ATTENTION: Score-Motor-Wheel "5" is NOT the fifth wheel - look at the "real motor" - then comes "Index-Wheel" then "1", "2", "3", "4", "5", "Impulse-Wheel" !!!

So --- have a look at the Coin-Relay - look at the relay and start a game - the relay shall (and most likely does) pull-in --- BUT it shall quit pulling after one Score-Motor-Turn of 180 degrees / half a revolution - question: DOES the Coin-Relay LET GO ?

IF (if) "Yes, let go": I would like to investigate on the "Advance Relay".
IF (if) "No, the relay does NOT let go": We must investigate in "my red stars"-stuff. Greetings Rolf

0Hot-Line-Work-01 (resized).jpg

Hi Brad
great, You fixed it. I am curious - You write in post-5: "Switch on Reset-Relay with wire-color-Blue-White" - question: And the other wire on that switch has color-Blue-Brown ? Greetings Rolf

0Hot-Line-Work-02 (resized).jpg

Hi Brad
You may say "it is fixed - the pin runs --- we let it be a mystery if cleaning the switch fixed the fault or if little gremlins were at work ..." - I well can live with this.

Thanks for the picture of the Reset-Relay. I show it again and I have put Letters to every switch on the relay --- A, B, C, D. The "D" is the outmost Switch - it is the ONLY Normally-Closed-Switch. I have found four switches in the schematics - "D" simply cuts the "Power" to the Playfield stuff (as the Game-Over-Relay also has such a switch) --- You shall NOT actuate the Flipper-Bats.

I also can identify "Switch A": A short wire runs from COIL to a Switch mounted in the Switch-Stack on the relay, see my "dark-blue line(s)".

So we have the "B" and the "C" in question - in the schematics You see: One switch makes the Score-Motor run --- the other switch helps actuating (with pulses from Score-Motor-Switch-Impulse-4) the Score-Reset-Relay and this pulsing Score-Reset-Relay makes the Score-Drums reset.

Reading Your description in post-1 and looking at the schematics makes me believe in "gremlins at work", greetings Rolf

0Hot-Line-Work-03 (resized).jpg

I also have a Hot Line. Recently it's gone into an endless start-up cycle.
I would appreciate some guidance on what to do. It's most like a dirty contact issue as the game does not get played often

Thanks

Hi instmusic
welcome to pinside.
I believe a "new topic" is more attractive then an "old topic". Start Your own topic, make an good description - You toggle-on the pin (strange behaviour ?) - You push the credit button - pin starts and does resetting (strange behaviour ?) Score Drums do reset (do they ?) - ball is kicked over to the shooter alley (is it kicked over ?) --- the very first fault / strange behaviour is of interest, greetings Rolf