[sparky]

Yes but thankfully with the modern age the mystery twidler have less and less to twidle due to software adjustment rather than components UNLESS the service menu is accessed. Even less likely if a service remote is required but this causes delays and more expense to repairs.

[Guest]

After 46 years servicing electronics, there is one thing that never fails to amaze me. A customer will bring in a piece of equipment that they "adjusted" something on and now it doesn't work at all. When asked why they "tinkered" with anything they don't understand, they would say that they felt like something just got out of "adjustment" and there couldn't be a failure with it. If we could just "readjust" the unit back where it should be, that it would be alright. In the first place, 100% of the time, it does have a "failure" to be repaired. Second, unless a neighbor, friend or some unknown "spook" got in the unit ahead of them, an "adjustment control" doesn't move to need readjusrtment. If a readjustment tends to improve their problem temporarily, that is another sign that a component has changed and is headed toward complete failure. Performing a change in a control during this failure, makes it just that much harder to repair "down the road" as now the tech is fighting two problems. The defective component and the alignment change.