What are some good troubleshooting techniques on how to test circuit leakages, stage leakages and component leakages. Leakage current upsets bias circuits and upsets the next following stage bias. Mostly from what I read is how to measure leakage current is to insert a current meter in series and measure the circuits or stage leakage. What are some signs to knowing if your circuit or stage has leakage. What are some approaches to take when dealing with components that has leakage current and is upsetting a circuit and how to track it down.