
Errors like that are normal after a battery change. I don't have a trimline, but assuming it acts like a G23 you probably got red screen errors correct? If so, turn the jackpot reset key and follow any instructions that appear. If all is successful you should end up with a "No game enabled" screen. From there you'll need an Ekey7 to re-enable the game and change any other options as needed.
Post a couple of pictures of your machine and the error. They have to be less than 1MB to post, so resize them as necessary to get under that limit.