Donkey Kong Monitor Issue?

[wallstreetdude68]

Ok guys, I'm new to this so bear with me.  Purchased an original DK machine a couple of months back.  Bought the chip to add to the board to include Freeplay and DK2.

Last week out of no where, Mario, Kong, the barrels and the Sprites all disappeared from the screen.  Everything else is still visible crisp and clear.  Scores, girders, etc.

Any ideas on what's going on and how I might fix it?

I'm a total rookie here...go easy on me.

Thanks.

[mgb]

Check this thread out from klov forums. I also reccomend that you do some further searching on the forums over at klov and check out the repair logs at mikesarcade.com
http://forums.arcade-museum.com/showthread.php?t=68601