"Progress is wonderful"....well, sometimes.
I have a Dodge van....BIG one...1992. It needed a new transmission a few years ago. They transmission place called and said "we are getting a readout on the diagnostics that says there's a problem with (some arcane part). We can't find it."
   So we all decided to just ignore it. A couple years later, it needed some other odd work, and a local mechanic also noted this readout about part 'X'. He said "Let's take a ride." and we drove over to a place he knew where a guy in the parts business was consulted. The outcome? My van was a transitional model that was only made for a couple of months and that 'part X' didn't exist for my van! And of course, no one thought to update all the software and manuals for such a small item.
   There have been several times when only a clever mechanic who knew enough to 2nd guess the computer readouts saved me from expensive tinkering and/or replacement of stuff that was not broken.

(I have used for 20 year, an old Hungarian fellow who runs a shop with his son and who has saved me many $$$$$ by just finding a frayed wire or loose sensor...etc.)



And I just saw the 327th repetition of the ad for "MyCleanPC.com", where you KNOW they will find something wrong with any PC.... which they will be happy to 'fix' for a price.