I'm working on Sega Batman that has a switch matrix issue. There are several switches that need to remain closed for a long period of time(like 1 whole second or more)to register. I thought I had dirty or sticking switches so I replaced those and still the same problem. So I removed connectors cn8 and cn10 and using an alligator clip and a diode I jumpered every row and column in the matrix and sure enough the problem switches were registering slow. All other switches register immediately upon jumpering but switches 44,45,46 and 60,61,62 have a lag in time to register. Does anyone have advice on why or what could be causing this? Any help much appreciated.