I think there was some confusion, my LC 550 board is a Rev. B (820-0595-A, 4.5V PRAM battery with velcro) and @kefkafloyd 's LC 550 board is a Rev. A (820-0368-A, 3.6V 1/2 AA PRAM battery) so we have confirmed both lack all 4 resistors, although more confirmation is never a bad idea...