Madaracs
Well-known member
I've been working on my joust for the last few days.
I just replaced the CPO and did a rebuild on the joysticks. They were working great.
I've been having intermittent problems that seemed power related so I decided to install the Arcadeshop relacement Williams Power Supply kit. I had great success with one of these on my Robotron so I thought why not?
Well, I measured the voltage at the supply and on the pins to make sure everything was good (5.06/12.20) before plugging in the harness and then I plugged it in.
To my dismay the game didn't boot.
I re-seated all of the connectors on the main board and the connection cables between the boards.
Powered up. It booted. And it reports "INITIAL CHECKS INDICATE ALL SYSTEMS GO"
However, there are credits in the machine and neither player one nor player two buttons do anything so I decide to go into self test.
RAM tests are OK, ROMS OK, and then I get to the screen where you can test the controls... ALL OF THEM ARE ON. It's as if every actuator, button, joystick movement are simultaneously being pushed. I also disconnected the harness to make sure there wasn't a problem with the wiring on the control panel... same results.
Then advancing to the next screen it goes down the list of defaults and automatically jacks up every setting finally landing me at the :Setting Attract Mode Message" where I'm unable to exit test mode. So I turn the machine off.
Switching between the new switching power supply and back to the old one has no effect, the same madness plagues me.
Could my PIA have given up?
I just replaced the CPO and did a rebuild on the joysticks. They were working great.
I've been having intermittent problems that seemed power related so I decided to install the Arcadeshop relacement Williams Power Supply kit. I had great success with one of these on my Robotron so I thought why not?
Well, I measured the voltage at the supply and on the pins to make sure everything was good (5.06/12.20) before plugging in the harness and then I plugged it in.
To my dismay the game didn't boot.
I re-seated all of the connectors on the main board and the connection cables between the boards.
Powered up. It booted. And it reports "INITIAL CHECKS INDICATE ALL SYSTEMS GO"
However, there are credits in the machine and neither player one nor player two buttons do anything so I decide to go into self test.
RAM tests are OK, ROMS OK, and then I get to the screen where you can test the controls... ALL OF THEM ARE ON. It's as if every actuator, button, joystick movement are simultaneously being pushed. I also disconnected the harness to make sure there wasn't a problem with the wiring on the control panel... same results.
Then advancing to the next screen it goes down the list of defaults and automatically jacks up every setting finally landing me at the :Setting Attract Mode Message" where I'm unable to exit test mode. So I turn the machine off.
Switching between the new switching power supply and back to the old one has no effect, the same madness plagues me.
Could my PIA have given up?
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