Yamaha Rx-a2a Service Manual -

If your unit is behaving erratically (shutting off, no video, network drops), the first "repair step" is updating the firmware. You can do this via USB or directly over the internet (via the Settings > Firmware Update menu on the front panel).

Unplug the receiver and hold down the power button for 10–15 seconds to drain residual energy from the capacitors. yamaha rx-a2a service manual

Excessive current flowing through the amplifier stages. Often caused by shorted speaker wires or overloaded channels. Thermal Protection If your unit is behaving erratically (shutting off,

Disconnect all speakers. Enter diagnostic mode to read the specific DC millivolt rating across channels. yamaha rx-a2a service manual

rail is generating stable voltage. If it reads 0V, inspect the standby transformer and the standby switching regulator IC. Audio Distortion or "DC PRT" Shutdowns