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

 Again, you might consider that the issue is with the thermistors in the “protection” circuit which can be seen in your photo literally an inch away from the power switch. Not protection in the sense that “OMG, there is a problem, let me shut it down to protect it” or the unit blowing a fuse to protect it from something but simply it’s an inrush-current circuit to protect the downstream capacitors. This is a normal circuit operation used each time the unit is powered on with the exception being that type of circuit operates differently based on the TEMPERATURE of the thermistors in the circuit. 
 

Just my 2 cents. 

@parkergetdean ,

"I am not cheap, I am poor."

I read that as someone who has his financial priorities straight and puts the needs before the wants and must choose wisely with the budget at hand. Nothing wrong with that. I do the same. I’m nowhere near most guys here financially. That’s why I constantly search for bargains with patience and research extensively what I’m interested in and can afford. There are some killer deals out there. And yes, a couple great examples came from Craigslist.

@seasidelps thank you! I will tell the tech this, but still - wouldn't touch it myself. I think the power button is the weakest part of this generation, I had the A3.2 and it was tricky too.

@thecarpathian I wasn't complaining, as we all know: it's a choice. But seriously. craigslist is fine, yes, there are creeps and jerks, but I never risk more than I can live with losing.

@parkergetdean 

If I may - when you speak to your new tech, you may want to confine your comments strictly to symptoms you have observed. There is no better way to antagonize a tech, mechanic, etc. than to regurgitate uninformed Internet advice in front of them. Unless you want them to charge you an extra $100 to test random components armchair experts pointed at.

I think I am perfectly within my lane to tell the tech (humbly and respectfully of course) what I learned. Obviously I am not fixing it, not capable of fixing, have no desire to fix it, etc., I am seeing him to let him fix it. If the tech gets upset, that’s good feedback. I am not his shrink but his customer.