pinballDan
Member
Just got done with a Defender and thought I would share what I found wrong with it.
The Game would boot up just fine, but did not make the start up sounds, you could coin it and it would add credits, you could start a game, but none of the controls would work, so it would not play.
Game had no sound at all, checking all the voltages were good, pulled the 6808 IC9 CPU chip on the sound board and put in a new one and then had all my sounds.
Went to check why the buttons were not working and now they are. Put the bad CPU chip back in and they quit again.
So a bad CPU chip on a sound board was stopping the controls (and sound) from working.
Got to love them old Williams Videos
Now to fix the Joust.....
The Game would boot up just fine, but did not make the start up sounds, you could coin it and it would add credits, you could start a game, but none of the controls would work, so it would not play.
Game had no sound at all, checking all the voltages were good, pulled the 6808 IC9 CPU chip on the sound board and put in a new one and then had all my sounds.
Went to check why the buttons were not working and now they are. Put the bad CPU chip back in and they quit again.
So a bad CPU chip on a sound board was stopping the controls (and sound) from working.
Got to love them old Williams Videos
Now to fix the Joust.....

