The fix posted by several of you and beautifully illustrated by macvette has been proven once again. After years of frustration and now, an urgent need to solve the problem due to my spouse's health problem that prevents her from hopping up to adjust things manually, I stumbled upon this thread. Voila. Like magic. It was a good excuse to buy a new up-to-date battery-powered pencil soldering iron that is perfect for this kind of touch-up. Splendid. Now to see if I can do the same magic with the DVD player!

Thank you one and all!