Sega Sky Target - video freezes

SilverDuck

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I have a Sega Sky Target, and it fires up, the audio is good, the "insert coins" screen is good, and the "choose your jet" screen is good. As soon as it gets to the part where your jet takes off from the carrier, the graphics get all shakey, and then the video freezes. The background music is still there, but you have no "game sounds", as the game is frozen.

First place to look?
 
I was able to run a test, and it shoes IC65 and IC66 as BAD, and when it tests those chips, the screen goes all wacky, so I think those chips are the problem. I will check to see what is needed to replace those.

Does anyone have a decent schematic of this MODEL 2A CRX board set? It is the CPU board that has the bad IC chips. Thanks
 
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i just got sky target, however i dnot have a manuel either, and mine isnt booting,

the model 2a crx board has led11 solid red and at power-up green leds 1-4 flash 2 times and thats it, marque ,coin slots light up i can hear monitor boot but no image fans also work


any ideas? a manual?
 
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