The external power supply on my Mackie Control Universal failed. No power.
All the forums say ordering replacements from Mackie is over-priced and very slow. But it’s just a generic 7.5V 4A regulated switching supply. I ordered this part from Jameco Electronics, and received it shortly after.
Jameco Part #206528
The connector on the end is not compatible with the MCU, but it’s a simple matter to swap its connector for the original one from the Mackie supply, being careful to get the polarity right. My MCU is working fine again.