Hi,
I received a 2018 MacBook Pro A1990, and the motherboard was replaced, presumably purchased on AliExpress. The motherboard's activation is blocked because the previous owner didn't delete it. Does anyone have a solution to this problem? I called Apple, and as expected, they asked me to activate the process with proof of purchase for the original computer, which I find very difficult, so the proof of purchase from AliExpress will be of little use. Any suggestions? Thanks.

I solved the problem, it was the 4 position switch with the broken tab inside sw179

I'll try to make a console reset, for the rest to which software do you refer to?...

Hello
I need your help with a non-functioning channel on this Denon controller. I noticed the problem because, with the mixing software, the channel appears completely off and none of its controls work. At the top of the channel, like the others, there's a selector switch that moves between MIDI and external audio inputs. I also tried connecting an audio source (since it's also a standalone mixer) and I got no input. The flat cable connecting this panel to the sound card is fine. I'm attaching a photo and the service manual. I hope someone can help me resolve the issue. Thanks....