My Motherboard has also become faulty. The unit won't boot up.

So that makes it 5 that have been reported in this thread.

I wonder if it is some common fault that occurs after 5 years.

861v8+ID41 Revelation One filter, HD621, Musical Fidelity M8 700 mono blocks, Focal Scala (x2), Focal Mini Utopia (x3), Velodyne DD18, Oppo BD105, Roon NUC, 218, Radiance 2021, JVC X9000