Hi a few months back i replaced a 6116 with a NVRAM chip in my Banzai run but it won't let me change settings from AD 52 backwards sometimes AD 61 onwards and test mode it will let do what i want. Also the machine will set everything to hard sometimes replay changed kickback is set to hard when everything goes hard it will let change the settings as i wish from AD 52 backwards could that nvram chip be faulty

Tried the memory switch came up memprot failure and then went into attract mode i tried that memory switch on Big Guns and police force and that message did not come up tried factory reset it wiped the credits and high scores but left the old settings and still could not adjust them i do have another nvram chip but my other system 11 do not have that u25 socketed so i can't test that chip in another game

Solved the not accessing the adjustment menus turned out to be a bloody sticky coin door switch the game thought the coin was closed