[oceanplexian]

Once things started going to multi-layer PCBs it was the end of reparability. It’s too bad because I have fond memories of fixing broken components on PC hardware and game consoles, even as someone who’s not an expert and simply a hobbyist.

[squarefoot]

> Once things started going to multi-layer PCBs it was the end of reparability.

Very true, however having full documentation would help nonetheless. My water heater electronic board cost over €250 to replace, although it contains less than €20 parts; a preprogrammed uC makes it impossible to replicate it. If it had public hardware and firmware documentation, someone could repurpose a similar but cheaper board or replicate the functions using a different rugged enough uC board, which would also likely bring down the retail price of the original spare part.

[moltke]

My understanding is that the new manufacturing techniques stop many people but usually not skilled technicians. It's component serialization, keeping schematics secret, and exclusive supply chains that are the real problem.