Hello, I'm new to this whole thing and am trying to get Donkey Kong up and running. Here's what I've run into so far:
Loud hum - ordered the cap kit from Bob Roberts and that solved that.
Power supply - The -5 volt rails weren't working, only got a white screen when that was hooked up. Got a new one on eBay, swapped that one in, tested it with a multimeter and it looks good.
PCB - got an as-is board on eBay, looks to be in good shape. Took all the chips out that I could, cleaned them and put them back in. One of the pins on the 7CT chip was bent, straightened that one. With this board, all I'm getting is a blue/almost black screen with no audio. Checked the voltages at the edge connector, and all the voltages are there.
I took this board by a local arcade, and they swapped it into a Popeye machine, and got the same results. However, it looks like the voltages aren't the same between the two games, so I'm not sure what that told me.
Now I'm sort of stuck. Anyone have any ideas?
Thanks in advance!
Loud hum - ordered the cap kit from Bob Roberts and that solved that.
Power supply - The -5 volt rails weren't working, only got a white screen when that was hooked up. Got a new one on eBay, swapped that one in, tested it with a multimeter and it looks good.
PCB - got an as-is board on eBay, looks to be in good shape. Took all the chips out that I could, cleaned them and put them back in. One of the pins on the 7CT chip was bent, straightened that one. With this board, all I'm getting is a blue/almost black screen with no audio. Checked the voltages at the edge connector, and all the voltages are there.
I took this board by a local arcade, and they swapped it into a Popeye machine, and got the same results. However, it looks like the voltages aren't the same between the two games, so I'm not sure what that told me.
Now I'm sort of stuck. Anyone have any ideas?
Thanks in advance!
