Hello guys!

Well, this is sad... I (used to) have a perfectly working Grand Prix and while replacing some bulbs under the play field, the play field fell into my head breaking the 500-point tiny coil (M-29 / 1000) on the right side of the play field, tonight I replaced it and now the machine is (still) mad... very mad, so let me start with the first error.

At start up. I will turn on the machine, everything will be nicely silent but when I press the start button, this happens (video):

The hundred-point score wheel of player 1 will go on and on.. and on.

Any leads on what to look?

Thanks guys!

Thanks for your replies! Yes it seems that something is still bent... somewhere. I'll double check every switch under the play field. One interesting thing though, If I drop down one (or any) of the stand up targets and then power the machine on the targets will go up constantly, meaning that their (4) coils will be firing... rhythmically.

Lee, yes... neighbor! We should get together one of these days!

Thanks again!

~jose

Thanks to all! I will check it out with more light and more patience.

Thanks rofl... as always, so accurate!

Best,

~ja

Ok.. so I'm next to the machine; I went through the switches on the play field and couldn't find anything out of place, so let me describe what is doing right now...

- I will turn on the machine with plenty of credits available
- Press the start button once
- Score wheels will reset Player 1 lit, ball 1 lit.

Then:

Sometimes the machine will start scoring on increments of 100 until I turn it off.

Sometimes (and very few times) the machine will be ready to play (silent), but as soon I manually trigger the top out hole, the coil will be firing until I turn off the machine, the same if I manually drop one of the drop targets, their coils will begin firing non stop until I turn off the machine.

Lastly, while the chimes and coils are firing i will press the start button once, player 2 will lit, then it will lit player 3 and ultimately player 4 by itself.

It seems that whatever coil is being triggered (out hole, drop target, or adding a player) it won't stop.

Man, I -really- love these machines but sometimes I rather hug my crazy dog.

Any idea?

As usual, many thanks for your input!

~ja

A brief update, Grand Prix is out of the pits! woohoo!

Thank you very much to all for their helpful input! Yesterday Runbikeskilee stopped by to personally take a look at my issue and in less than 5 minutes he pointed out a 500-point switch contact that was stuck together (above the play field, behind a rubber and under a plastic cover!)

Man...

Seriously, thanks to all and now I'll be working my way onto Wild Dave's pin. (Card Whiz, my other thread)

~ja