Both AC's quit.

Start capacitors are only there to provide a boost to the compressor to get it started instantly. They provide up to 5 times the torque to get the compressor spinning than without one. They are not meant to be in use from more than a split second or they'll fry themselves. Capacitors are made by tightly wrapping aluminum foil and waxed paper around each other. When they overheat, the wax melts and boils creating pressure that spews out the top of start capacitors or bulges the top of run capacitors. One time is all it takes to ruin them. The run capacitor is in the circuit all the time but a relay of some type. The mechanical relays of old had contact points that could stick closed and ruin the capacitor. New methods use a solid state device that's operated by heat. Run capacitors are most likely damaged by spikes in voltage that burns a hole between the layers of foil and short out the capacitor.

It's hard to find any made in the USA today but they are considered much better quality and closer to specs than those made in China but cost wins out almost every time and China has the market cornered right now.