Flickering / unsynced video on Nintendo VS Super Mario Bros?

Mauricio

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Flickering / unsynced video on Nintendo VS Super Mario Bros?

Hey folks,

I am testing a Nintendo VS PCB with VS Super Mario Bros (running on side B), using a JAMMA adapter and supergun, connected to a VGA monitor with the GBS-8200. I am seeing a flickering problem with the display, as if it is not syncing properly. Have a look at this video:

https://www.dropbox.com/s/a5x458ue4a57g9y/super_mario.mov?dl=0

I have also attached a picture of the PCB, in case some switches are relevant. There is no game on the other side, just the dummy chip. This same JAMMA test setup works fine for several other games; the sound is also fine with this one. Any ideas what might be going on here? Thanks!
 

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