Replacing LAMINATES COUNTERTOPS? I just brought some unmarked countertops and the person that suppose to...

I just brought some unmarked countertops and the person that suppose to put them contained by never showed up. Does anyone know step by step on how to take past its sell-by date the old wood countertops and putting the hot one on. Its already cut and ready. But the instructions that I save finding on the internet is telling me to unscrew the frail countertops from the cabnets but there are not a bit screws to unscrew! Please assist!
Answers:    Check to see if there are screw in the corners, you own to look inside the cabinets up surrounded by the corners, check with a flashlight, (there may just be a few). If you still don't see any screws a moment ago cut the caulk line at the put a bet on of the countertop where it meet the wall and try to lift it up. You may hold to pull rugged a few times to get the cement to loosen. I hope this helps!