Just picked this up last week. Here's what I've got so far: power it on in test mode, speaker hums, p1/p2 buttons light up solid. Button presses make beeps but no picture. Switch to game mode and p1/p2 buttons blink and spot killer flashes on and off but still no picture.
Then I did the following:
1) big blue replaced (also tested with another power brick I know worked before and had same results)
2) cleaned edge connector
3) re-seated the 6502 chip
When I powered it back on I got similar results as before but this image showed up in test mode (see attached). Here is what it looks like when I switch to game mode (video link) https://www.dropbox.com/s/kt613h56o9k9u3o/AD-spotkiller.mov?dl=0
I then re-seated all the chips on the board but no change. Voltages on the A/R I think are within spec (5.2V and 12.5V). The 10.3 is high but I read somewhere that it can show as high as 13V and thats ok. Correct me if thats wrong.
What should I try next? I have a limited tool set right now as I'm still new to repairing. If I've mislabeled or done anything wrong please let me know. Thx!
Then I did the following:
1) big blue replaced (also tested with another power brick I know worked before and had same results)
2) cleaned edge connector
3) re-seated the 6502 chip
When I powered it back on I got similar results as before but this image showed up in test mode (see attached). Here is what it looks like when I switch to game mode (video link) https://www.dropbox.com/s/kt613h56o9k9u3o/AD-spotkiller.mov?dl=0
I then re-seated all the chips on the board but no change. Voltages on the A/R I think are within spec (5.2V and 12.5V). The 10.3 is high but I read somewhere that it can show as high as 13V and thats ok. Correct me if thats wrong.
What should I try next? I have a limited tool set right now as I'm still new to repairing. If I've mislabeled or done anything wrong please let me know. Thx!

