Debugging Methodology — question 2 of 10
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Assume the regulator has an input capacitor, output capacitor, and a resistive load; you have a multimeter and a bench supply.
A linear regulator is supposed to output 5.0V but you measure 4.2V at its output pin under load. Before you touch anything else, what is the very first hypothesis you'd test, and what single measurement would prove or kill it?