Final answer:
Troubleshooting an amplifier stage involves checking each component within that stage and comparing it with expected values.
Step-by-step explanation:
When a problem is isolated to a specific amplifier stage, the next step in troubleshooting is to check individual components within that stage for faults. This includes examining transistors, resistors, capacitors, and other elements using a multimeter to measure voltages, resistances, and currents.
By identifying the components that do not meet their expected values, you can often pinpoint the source of the malfunction. This approach is essential in the process of systematically narrowing down the cause of the issue and finding a solution. In some cases, it might be necessary to consult the circuit diagram to ensure correct assessments of component functionality.