Tron questions - garbage on screen

scottmaggie

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Donor 4 years: 2011-2013, 2024
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So started troubleshooting the Tron I picked up this week. I have 2 board sets to work from. One totally dead and one with garbage on the screen. I figure the one at least showing an image is the right one to start on so:

What should I expect to see on the screen with only the Super CPU connected? (power and monitor)

I have actually tried this and there is no change - same garbage on the screen which is why I think it's got issues.

If the vid gen and sound boards do in fact need to be attached too then my theory is out the window... :0)

Oh and the PS is reading correct voltages.

Any thoughts?
 
Your theory is out the window! :)

You need to hook up the video gen board before diagnosing.

Leave the SSIO out until you have a working CPU & video set.
 
same difference...

Ok got it. Good I can al least leave the sound board off. However with 2 different vid gen boards there is no change in the junk on the screen. Sigh.
 
Can you take a picture of what the screen shows? It could be the ROMs, RAM or something else and a picture will provide a place to start.
 
good news sort of

Went to StudioPaul's today to test my boards in his tron. After fiddling with my two sets I got one workingset though some sounds are missing.

My power supply is in fact faulty. Guessing the reset circuit... Better a bad power supply then bad boards right? :)
 
progress!

Ok for a temp fix I cut the purple wire. Voila the game came to life. Monitor needs a cap kit and adjusting but game is playing. Yea Tron!!!!

As for the sound issue channel 1 is garbled and 6 is missing. I assume they have to do with the few missing sounds.... any help here is appreciated.
 
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