Your fuse panel has a main fuse which in campers is often screwed or bolted down in the fuse panel. This fuse is often overlooked. its quite larger than others.
You should start by checking the fuse box for a reset btton, or go through and check all the fuses, even the ones you replaced and make sure hat they are all in the right numbered fuse recepticles. If that doesnt work you should probably replace all of the fuses, you may have gotten a bad batch.