It appears that the only thing holding up our cabinets is a very large over-the-range hood (which also holds the microwave), and the cabinets are leaning forward slightly onto it. On further inspection, it appears that the top board on the right cabinet has ripped off. The cabinet has pulled forward about an inch, so we can see the board. When we open the cabinet, we can see the screw pulling at the flimsy backing of the cabinet. So...how do we fix this?