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An audio/video receiver (AVR or home audio receiver) is a consumer electronics component used in home theaters that convert signals into sound.

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kenwood vr-405, turned it on, no audio.

I have removed the shell, the video, the audio, and the power boards. I found a bad solder connection on the video board connected to a capacitor. On the audio board there is a 4 pin chip, and 2 tall transitors, they all smell burned.

I am not sure how to test the chip and the transistors to see if anything is actually damaged.

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Hi @zcrashcoot

Here's the service manual for the receiver.

Like most service manuals it has schematics, board layouts and a parts list. The schematic is on p.14.

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