First things first. Cleaning the board would be a last step.

The manual for the Aztecmonster, which i found online, says that there is a termination jumper. Set termination to ON. Next, set the ID to any number other than 3. 0, 1 or 2 would be good. Then try to boot and report back.

Spitting out a floppy can mean that the floppy drive requires servicing, i.e., careful cleaning and careful lubrication. It is likely that you will need a working floppy drive to install system software, even if you have the CD, so this is also important.

But first set termination and ID, and tell us the results.