Hi,

Machine is a Dell Inspiron 530 desktop, circa 2012, running VistaHP x86,
belonging to my 93 year-old mother-in-law. She called me to day and said
"It's broken".

The power button does nothing. When I hold in the power button, there's no
sound whatsoever. The fan in the back of the power supply does not spin,
but the little green light on the back of the power supply does glow green,
When unplugged, the light goes out. Other than that, nothing makes a
sound, and nothing else occurs.

Here's the power supply:

https://postimg.org/image/4hdxxqbwkr/

Sound like a PS issue?

TIA