Radio and sat Nav not working completely dead.. 2012 megane

I was pulling randon fuses from glovebox fuse box looking for a blown fuse as interior lights on my 2012 Renault Megane were not working.
I found and replaced the blown fuse and interior lights are now working

However instantly the buold in sat nav and radio are completely dead just a blank black screen on tbe display.
It was working perfectly fine before I began taking any fuses out to find the blown fuse for interior lighting
I even bought new fuses for radio and sat nav and still absolutely nothing.

Any ideas pn how to resolve this will be much apprecieted

Many thanks