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So the standby indicator never changes state? If so, more than likely, your amplifier has DC Offset(a damaged amplifier inside) which will keep the speakers off, and disable any use of the front or remote functions. If you are interested in having your Sony repaired, please refer to my website, audioserviceclinic.com. You may contact me there. Thank you.
First, try unplugging all of the sound system and plugging the amplifier into an outlet on a circuit that was not changed by the electrical work. Also, plug an outlet tester into the outlet you were using for the amplifier to make sure it is correctly wired. If one outlet in a system has hot and neutral reversed and others don't, this could cause problems with some designs.
If you are lucky, dirty power from sparking inside the circuit breaker crashed the control circuitry in the amp, and it just needs a hard reset (power disconnect/reconnect) to be made functional again. In the worst case, something got fried and you'll have to use instruments to track it down.
Is there power at the outlet socket? Check the power cord from the outlet socket to the amp.If the power indication light on the amp does come on the you will need to check the internal fuses.Some models have an external fuse located on the back panel
This is a wonderfull idea, a great way to learn about electronics. Open the top of the amplifier, check for any internal fuses, if they check out, the power transformer may be open at the primary, [ too wires ] If you have a digital meter set it on ohms and touch the probes on the too wires going into the transformer, if no reading the power transformer is open.
if its the controller that you're talking about then check the batteries o get a new controller. for our tv, we had a controller called a peanut and i would bang it around sometimes for no reason just for fun i gues, after a while the bottons didnt work so we just got a new one
when you turn on the AMP and the red light comes on give the amp 2 seconds and turn it back on the red light should turn off. That is what I do with the amps at my church and it works for me, I hope that this works for you too.