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This Display went black from one day to the other. I suspected a boot-loop problem as many had experienced before. As I didn't want to ship the entire display, I stripped the logic-board and sent it to Erwin. He was highly professional, directed me in the first place to the logic-board and even asked me to check the power supply board as well, as they may brake down on their own. I have a tinnitus, so I didn't realize that the high pitch sound expected in a working power supply board wasn't there, so I left the power board where it was. Foolish me.
Erwin has a dedicated test display in his lab, so he was able to hook my logic board on his display and prove that it was fully functional. He communicated extremely professional and timely about the procedure and possible costs. I then sent in the power supply board, which he fixed in no time.
Please take into account: I had brought this 2000+€ display back to the original reseller (it broke just after the warranty period), and they determined that costs for diagnostics would outweigh remaining value and asked me to leave it for recycling.
That's when I searched for skilled help, and I found it with Erwin
In the end, basic electronic parts worth some pennies, easily replaceable by a duely skilled electronics specialist, were about to render this beautiful hardware into high-value-trash? Not with Erwin. Thanks to him, this display has come back to life. Also, this kind of display, featuring Mac-unique thunderbolt technology, is no more produced, so any professional still working with the excellent trash-can MacPro line will appreciate this excellent, professional service. Worth every penny and way less than the cost estimate by my reseller shop. On top, the contact with Erwin is very pleasant, he is a very kind person, one of the kind you would like to chat with on a different occasion than on a monitor repair...