Yamaha power amplifier can only be turned on with an electric fan.

Yamaha power amplifier can only be turned on by a hair dryer because the machine is cold or humid. Yamaha power amplifier can't be turned on when it rains and gets wet. When you start the machine, you always need a hair dryer to blow it first, and then you can start it after preheating. When the weather is cold or humid, turn on the Yamaha power amplifier, only hear the relay ring twice, and then stand by after the screen lights up. Blowing the amplifier board with hot air can start the machine, and it is still the same after cleaning, drying and cooling.