Gently pry up all the socketed chips and re-seat them. Also, locate the square chip
called Agnus and press down on her. If this doesn't do the trick, you could try removing
her completely and reseating her, but I recommend you purchase a real PLCC chip
removal tool to do this. The tiny screwdriver method is risky because you'll probably
end up cracking the socket.
Let us know how it goes!
