that is more likely to be a fault on the game board,when you get minor graphic glitches it usually down the either game board inter connectors,eprom loose, low +5 volts and worse case scenario is a possible i/c failure.
this even more likely after moving a cab.
your best bet is to switch the cab off,open up the cab and make sure any plug to game board are well connected,then look at the game board-if it has 2 or more layers of board make sure they are pushed in to their respective sockets firmly.to do this just gently manipulate the boards by hand using downwards pressure on the top board whilst supporting the bottom board