amp I bought 3 days ago not powering on - electrical engineer advice wanted

So on mine for the volumn it did not work the volumn so like tha cat and curious i took the top off.there is a motor and gear .I cleaned it with compressed air then deposit electronic cleaner put very light oil droplet through a syringe needle and it works. Save myself some money and exercise. Happy listening.of course make sure you unplug it and wait for caps to discharge.

thanks markus ! It's certainly worth a try!

Whatever you do, once you get it sorted, solid state equipment should be not be turned off.  This practice minimizes stress on the inyernal components and likely allows the unit to last longer.  Turn it on and leave on.

so for a couple weeks it mostly turned on, after a few tries. This week it mostly didn’t. The repair shop I frequented gave me the cold shoulder for no apparent reason, so I finally opened it up. I bet it would be a simple fix but I don’t know what I am looking at. There a button that goes in and it turns on the power, I assume a mechanical step to close a gap? Should I just replace that board?

What did musical fidelity say?