Konami Incan Pyramid Hopper Disconnected error

[Spitfire]

Hi all my pokie machine that i use at home has come up with A Hopper Disconnect error and i cant get rid of it. The Hopper is powered up and green LED is lit. When i remove and replace still doesnt detect it there. I have connectivity all the way from hopper to board. Have replaced boards reseated plugs on board. Etc etc but nothing works. Tested power supply on boarfs all as they should be. Replaced cmos batteries on boards and reset bios as had batteries out and still no good. Tried everything i can think of but still error as in pic. Cant reset using reset key due to error. I did have a few seconds of joy after ha ing a good look at the game boards and fiddling around abit. Once replaced and booted up error went and allowed me to reset and play for a few spins but the error appeared again while playing and no good since?

Please help any ideas appreciated? As it seems to be a board issue!