I have been working to restore a Donkey Kong cocktail and I have made great headway. The original boards were dead except for the startup sound. I bought a partially working boardset off eBay and got the game to play with the sound effects but no music.
I pulled the sound ROMs out and they were corroded horribly. There were 3 legs that broke off in the sockets. That helped, but I only got a dull buzzing instead of music. So I pulled the CPU chip next to the ROMs and had 2 more legs corroded off. I replaced that (fortunately I had a spare sound board, Rock On Hoarders!). Powered up and let there be music and sound effects. It was a beautiful thing, until the video acted up.
The pictures below show the story. It seems to randomly flip between correct colors and the bogus ones. When it is good it looks great, when the background goes off, it looks like crap.
I have reseated all of the ribbon cables and pushed down all the socketted chips I can get to.
Any hints on where to start.
Any help would be appreciated.
Thanks.
ken
I pulled the sound ROMs out and they were corroded horribly. There were 3 legs that broke off in the sockets. That helped, but I only got a dull buzzing instead of music. So I pulled the CPU chip next to the ROMs and had 2 more legs corroded off. I replaced that (fortunately I had a spare sound board, Rock On Hoarders!). Powered up and let there be music and sound effects. It was a beautiful thing, until the video acted up.
The pictures below show the story. It seems to randomly flip between correct colors and the bogus ones. When it is good it looks great, when the background goes off, it looks like crap.
I have reseated all of the ribbon cables and pushed down all the socketted chips I can get to.
Any hints on where to start.
Any help would be appreciated.
Thanks.
ken
