Atari System One Issues

Boo32

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Oct 18, 2010
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Richmond, Virginia
I have an Atari System 1 cabinet with a marble madness daughtercard. When I turn it on, there is a variety of garbled mess on the screen. When I turn it on in test mode and press player one, it goes into a test mode but not a full test mode. It skips the ram/rom test and goes right to the switch test. It does not do the coin options, game options, statistics or histograms. It goes to the motion object test, but it is just a blank screen and the test does not work. The motion object obscuring test does not appear and the motion object height test does not function, but does appear. The alpha test and color tests function and look great. The convergance test does not come up. The sound test comes up and appears to work. The color palette test does not work. Sorry if the post is overkill, but I am not sure if there is any significance to which tests work. Tested power and it is getting power at the board.

There is also an LED on the main board. It sometimes flashes and sometimes does not come on.

Thanks
 
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