Over time, as i stated earlier i your previous thread,
over time the jacks will fail
remember the swtiches we talked about
Like a headphone jack that shuta off the external speakers when the cable is inserted
That switch is held open when the plug is inserted
Over time dust and gunk gets on the contacts
Making it fail
Not a big deal
But when you go to remove the cables you will need to jusmp the send and return with a patch cable
I've had to do it on all.mine