My DSX9 is quite a few years old now and been faultless until this weekend where I've been experiencing all sorts of 'issues' with it.
I've read a few times about these sets needing 'recalibrating' and that this can be done from within the secret service menu.
What are the symptoms that would suggest recalibration is needed?
How hard is it to do yourself?
Does the set have an internal memory battery that can loose it's charge and need replacing?