Mike Tomlinson wrote:

It's a 3.5mm jack plug, but they come with internal diameters of 2.1 and
2.5mm. Your 'new' PSU has the 2.1mm 'ole and you're trying to get it
into a socket with the 2.5mm pin.

Cor, where you been living for 10 years? There's about 4 different
diameters of centre pin and 5 different outer diameters.

--
Scott

Where are we going and why am I in this handbasket?