Pcb help

dyno

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Still working on my atari avalanche pcb, when you turn the game on all you get is scrolling raster lines down the screen, the game has a self test mode for the ram and roms and switches. When you turn on the self test I never get a message regarding the ram or rom like the manual says but sometimes but not all the time the switch test works. Also if I turn the game on sometimes only the light on player one lights up and the game makes a horrible squeling sound. This is the 2nd avalanche pcb I have and it has the same symptoms of the first board that cam with the game.
 
Make sure the tilt switch inside the coin door is not bent and making a closed circuit. Also verify the voltages. Sounds like it maybe a problem with the cabinet if you have two boards doing the same symptoms.

-Brian
 
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