Black widow corrupted video problem

danpiraino1971

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I just went through fixing the monitor and now get a picture, but the video is corrupted. I can coin up the game and play it..I hear it playing but the video is all messed up. during attract mode the screen just has a bunch of random numbers and letters all over it. When the Black Widow name displays its not spelled right and its larger than it should be. The spot killer on the deflection board goes off and on depending on what screen it displays during attract mode. Still when its on it doesnt kill the video. Looks like its a logic board problem, I have tested every transistor in the monitor. Game plays fine so Im thinking I need to look at the vector generator section of the board. Some tips I have read point me toward the latches and the counters, also the Vroms and Vrams.

Any input would help,
Thanks, Dan
 
Put on test mode only shows screens 1 thru 3. After that just goes back to screen 1. All three screens are corrupted and distorted. The only one thats have way decent is screen 3. The pictures so screens 1 thru 3 and the last two so the attract screen.
 

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