Stereo amplifier won't power on

Symptoms

• No lights or display when pressing power
• Power light flickers briefly then goes out
• Amplifier makes a click but doesn't stay on
• Was working fine until a recent power outage or surge

Likely causes

• CommonPower cable or outlet issueA loose cable or dead outlet is the simplest and most common cause of no power.
• CommonInternal fuse blownMany amplifiers have a replaceable fuse that blows to protect the unit from power surges or internal faults.
• PossibleProtection circuit triggered by a speaker wire shortA short at the speaker terminals can prevent the unit from powering on or staying on.
• PossiblePower surge damage from an outage or stormSurges can damage internal power supply components.
• Less commonFailed internal power supplyA more significant internal component failure prevents the unit from starting at all.

What to do

1. Confirm the power cable is fully seated and test the outlet with another device.
2. Disconnect all speaker wires and try powering on the amplifier alone to rule out a speaker wire short.
3. Check the amplifier's manual for a replaceable fuse location and inspect it for a visibly broken filament.
4. If a spare same-rated fuse is available, replace it and test again.
5. Try a different outlet, ideally not on the same circuit as whatever may have caused a recent surge.
6. If the unit clicks but doesn't stay powered, this points to a protection circuit or internal fault needing professional diagnosis.

Tools and parts

• Multimeter (optional, for fuse testing)

When to call a pro

If replacing the fuse doesn't restore power, or a new fuse blows immediately, the amplifier has an internal fault and needs professional repair.

Safety