Those "thru the board" connections have always been a source of problems in the design of circuit boards - for decades now!
General Electric, Sylvania, Philco, Motorola, and quite a few other brands have used that design in their TV sets and stereos, and lord knows I've had to re-solder countless ones over the years.
The "invention" of plated-through holes in double-sided boards seemed to have eliminated that, for the most part.
General Electric, Sylvania, Philco, Motorola, and quite a few other brands have used that design in their TV sets and stereos, and lord knows I've had to re-solder countless ones over the years.
The "invention" of plated-through holes in double-sided boards seemed to have eliminated that, for the most part.
Its a common misconception - in electronics, especially modern electronics, I'm afraid details really matter, these are complex systems with analog parts, digital parts, mechanical parts, software, and many many design decisions that have taken place to end up with each particular model of player. And typical designs change over time as new technologies come along with great rapidity.
From the initial description it could be a loose connection somewhere, but equally well could be a corrupt firmware issue or a failing chip or component somewhere on the signal path, many possibilities - without knowing what player you can't even know if it has any firmware 🙂
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