According to the circuit diagram, the bulb and the resistor are connected in series, and the ammeter measures the circuit current; Close the S key and the circuit works normally. After a while, ammeter A shows zero, indicating that the circuit must be open.

(1) Connect wires in parallel at both ends of R. If the ammeter indicates, the circuit is a path at this time, so R must be open.

(2) Connect the wires in parallel at both ends of L. If there is no indication from the ammeter, it means that the circuit is open, then it may be R open or L and R open or R open and L short.

So the answer is: (1)R open circuit; ? (2) Right open circuit or left and right open circuit or right open circuit and left short circuit.