** Tappan Microwave oven. Model 56-4884-10/04334. nothing comes up on the LED panel and there's no beeps. I was wondering if it might be a replaceable blown fuse in the oven **
Most microwave ovens have (at least one) internal fuse, yes. Your model has two different types (see the following links).
** looked around the oven and couldn't find where it might be. **
The microwave usually needs to be disassembled (or at least the cabinet removed) to get to it. Be very careful working on microwave ovens as their capacitor can hold a charge even after being unplugged!