tech: cps-1 a boards

chips4sle

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i have 2 cps-1 A boards
the first board shows all the graphics as $$$$$$ in the background

the second board has too much green
it almost shows a blur of green and during diffrent p[arts the green will go away

going through the boards i have determined that the A boards are the problem
 
Board 1 - bad RAM.

Board 2 - hard to tell from your description, give the edge connector a good polish tho, as oxidised jamma fingers can cause you to lose RGB channels, losing either the R or the B may may the screen look like its got too much green everywhere, it depends on what image is being displayed really.
 
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