How do I identify this component? It just says 0 on it
This is a 0 Ohm resistor. Probably in 0805 package.

If the multimeter shows infinity (open circuit), or any significant resistance > 0, when measuring the element's resistance it means that it is damaged. The multimeter should show zero resistance when measuring such "resistor". 

On the PCB you can replace it with a solder blob or a piece of wire.