Reasons for devices failing throughout the house

Hi,

I have no experience of this sort of thing, so excuse the naivety of my
question... In the course of the last few days, our house has
experienced at least six electrical items failing. This includes a
network router and a set of speakers, both of which stopped working
sometime during Sunday night. Countless other devices have failed since
then, including a Sky+ satellite box, an electric fly catcher, a wall
heater... I know all this could just be bad luck and we're seeing a
pattern where there isn't one, but could there be anything that could
have caused these apparently unrelated faults? We use surge protectors
to protect our computers, yet the speakers and network router failed at
some point in the middle of the night.

Again, apologies if this sounds naive but I'd like to know if I'm just
being paranoid before I call an engineer in to chase these ghosts...
:-)

TIA,

Jerry.

.

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