> Good engineering practice has never failed me

You might remember a question I had (29th Nov) about repairs
to a device with a switch-mode PSU. It had lost all power and I
suspected the cause was a dry joint on a power switch pad

That was indeed a fault, but there was more. None of the connectors
on the back panel (audio I/O, IEC mains connector, footswitch and
a couple of others) had securing screws. They all relied on the solder
to pads, and as a result most were very very weak. The IEC socket
connection was broken in two places due to the force needed to push
the plug in. For the want of a little anchoring, the unit had to be
repaired, costly and inconvenient to the owners, and could have failed
disastrously through arcing, or worse, had annoying intermittent
behaviour

Another case was a Dunlop Crybaby Wah pedal (cheaply made but
not cheap to buy). For want of a protection diode the thing was totally
burned out by a reverse battery

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