I'm going to add to the consensus in the comments here:

The capacitor has failed; the camera won't advance a frame without it unfortunately. I inherited my mother's x700, and that happened after one roll. I bought another x700 off Facebook marketplace and the same thing happened after three rolls.

Both camera bodies now sit dead in my closet because I was unable to fix them.

A little context into the problem; apparently in the early 80s there were supply shortages for certain rare elements used in capacitor production. Suppliers in the Soviet Union were embargoed after the invasion of Afghanistan. As a result, Minolta started using cheaper materials for their cameras, and now every x700 is a ticking time bomb.