A Story about modern fuses.
AIWA VCR, strange fault, on playback, vision was normal, but sound was from incoming tv signal. Spent forever tracing. Eventually found that 5volt logic signal that selects sources was only about 3.8volts. The Cause ? a fuse (known as a circuit protector) gone high resistance, only about 10ohms. This fault was later reported in AIWA tech reports. Have had it a few times since, but never with a Wickman type fuse.