Power Amplifier Longevity

I have a fondness for Class A amps and so paid a fair bit when one of them went south on me, but the particular model I have is quite rare so I didn't even think about not having it serviced. It was over 30 years old. I have two other amps of the same model still going strong, as well as an early Jeff Rowland amp (also 1980s) that still serves in my AV system.

On the current inrush issue, I have an early Belles class A amp that welded the contacts on the switch together due to that. After replacing the switch for the third time, I left it welded together and turn it on and off using a heavy duty power bar!

I have a McIntosh MC207... there 7ch amp that has been in use since 2004....16 years old. It was a dedicated theater amp that for around 7 years did not get used but a few times a year. For the last 2 years it is now in the den system and is used everyday. It still looks and works like new. 

Brian
I have both an Anthem MRX 710 and an Emotiva XPA 5 for sale.  I simply don't do surround media anymore.  If interested let me know.  Both with very low miles and in excellent condition.

And the blind man yelled, "The caps are drying out. The caps are drying out."
Ha ha, Finally a "decent", conversation on the subject.

But again, many seem happy simply to put two cents in.
 And some are worth more!
Heaudio? .....So you've designed electrical equipment and brought it to market?
 It was "UL" approved and then of course, "UL-rated? But alas,"You", did not think to have any IR limiting of any type. Added for any correction or means of protection? Well, since that really doesn't mean anything. Like your words stating that I am wrong about this. Which don't mean much either....since....

 Actually?, The odds are quite high that you "Did", in fact design IR limiting into whatever you are fooling with and bringing to market. "Knowingly OR not! If the electrical device or system followed the NEC, and any other appropriate, local authorities and their addendum, "If any". And you worked utilizing the approved guidelines, materials. Tables and math, governing electrical devices, with the same intent. And the installation and "use of". In the, "Plan, build, use. Glossary and Index." sections were also utilized with an good understanding of the NEC's, "Intent".  All in accordance with the currently, "Adopted", version of the NEC?
Then you did.  Because "We" did. Otherwise it's a bit hard to get anything "UL rated"...….
 Like the guy whom invented sand? I don't believe he designed in all of "sands" insulating properties necessarily on purpose . But since he followed basic "Physics", in the design phase of said, "sand"? 
Sand now, "has", insulative properties.....
 Just sayin....

Heaudio? 
 Also, a bus fuse, "As in ANY bus fuse". Is not IR limiting?
 I guess they are just wasting our time with the fact that they ALL have an precise "IR value", at which point they fail. (Always listed in the device, "properties"), huh?  
Which is why I have used them in designs as "Temp. emergency, "IR" breaks" in switchgear systems during emergencies.
 Also, the reason for many electrical components in a system being de-rated during design is usually for use as a "Safety Factor". Typically calculated as a proportion. These tended to be, "Pre-60's-80's". Always a minimum of 1:4- 1:5. Dependent on the quality of the product line, name and reputation etc. "These days, if used at all"? " I'll notice a percentage in de-rating specs.…."
Many really do not even know or realize. That any such animal ever existed. "The safety factor as it once was". "Kinda like the declared IR value of a fuse. And it's significance in relation to a specific electrical device or system in part OR it's entirety. 

To one, Mr. "JHertzlee", First off. I am not trying to be mean. Nor condescending. And I am simply stating the truth as I see it when I tell you that currently? You are of a mind to be more, "Part of the problem". Than, "Part of the solution". And I truly hope that in a few years you have occasion come back. Reread what you have stated above. And, "Find the light".
 Please, It sounds like your understanding of "transduction", is from a "Tech manual". And it's "Glossary", was very limited in it's scope of understanding. You may want to do a bit of research on that one.
 Also the "Heat" comment? please rethink that. "They are called (Operating temperatures). for good reasons". OR "Should I"? Keep my Hi-End, HiFi, Very expensive components "Inside" of the freezer walk-in. Which I had modified to hold these audio components and still allow the remotes to work for function? Complete with a "Remote Control Repeater". Which means they can just stay at the brisk -22F. in the filtered, Ion rich, cold air, freezer.
Would it not sound better? And last much longer?

"Otherwise, I'm leaving that one alone".  since many would think me cruel if I was to do anything else.

 And, a percentage of your income is attained by, " doing what exactly"? 
Is there perchance a "list", of the parts type. Which would, "Automatically", get changed/replaced by any of the techs working there? "This assumes whomever dropped the amplifier off. Also agreed to pay for a full servicing of the fourteen year-old, Solid State, class A/B, two channel amp with the "Very reputable name", and without, "nary" a scratch on it!. An amp which would bring say, $3800 firm, as it sits on "Audiogon". Very quickly. 
 I would be very interested in your answer, JHertz
   Change All the main, large caps? All the little one's too on the PCB? Interior fusing? Indicator Lamps? A can of WD-40, Then a can of air to blow out the Pots and dust off the PCB? Anything else? Set the Bias if applicable, Give it a listen and then "Unless another problem rears it's ugly head"? Onto the shelf to wait for it's owner? Avg. overall cost?
 I guess "Refurbished" is now the same as "Rebuilt"? or even, "Fully Serviced"?
 And just to ask, To re-flow the avg PCB in the avg. SS amp. How much would it be? if about avg?