Dear Alistair,
thank you for taking the time to explain the background of this "behaviour" of Offical Resellers. I am afraid that I cannot fix that Macbook myself because the RAM has a defect and it is soldered on-board. They say I need a new mainboard.
The annoying part is that they create completely unnecessary work for me because they refuse to order the part and simply replace it as soon as they have it on site. But in the light of your explanation I understand that itīs a matter of distrust.
My consequence is that I will buy the next Apple computer from a discounter which was recommended by our PR agency. Usually, I have the approach to support local stores even if they are more expensive, because they can offer better service. Seems that this does not work in the Apple world.
Andreas