"Jerry G." wrote in message
...

The unfortunate part is that much of the newer equipment is designed to
not
be serviced, ...
For the field service during warranty, most of the products are serviced
by
changing them completely, or changing a complete board or assembly.

We've been through several cycles of this already, of course. In the 1950s
people commonly replaced just the paper cone of a speaker, or just the voice
coil. Now a speaker is a component. Similarly, nowadays a circuit board is
a component, as far as manufactured equipoment is concerned. Circuit boards
are basically custom hybrid ICs.