You need to specify what type of machine you have, but I am guessing is a players edge or game king type machine? Please verify so that a moderator may move this to the right topic area.
As far as your CMOS error is concerned, it is normal to get a cmos error after a battery replacement since the cmos is powered by the battery that was replaced, so it needs to be re-initialized. Depending on your platform, you may need a key or clear chip, or just a matter of pushing the reset button on your mpu or cabinet and probably twisting the jackpot reset key a couple of times. Again, you need to verify for us your machine type.