ive been working on a yale erc050rgn48te084 lifttruck with some electrical issues.. It started out having intermittent power to the display(premium display) and turned out to have a bad display. Installed the new display today and when i turn the keyswitch on its not in any modes. when i press any of the function keys to go into a mode (ex mode 4) it says requesting mode but never goes into the mode. ive checked the parameters using the smartset program and dont find any of the values out of range.. please help im ripping my hair out trying to figure this out...