Add 5A "Ideal Diode" in 12V FMC power line
The 12V to 3V3, 10 Amp power supply on SPEC7 (N2, EN29A0QI) is protected by an Under Voltage Lockout Protection (UVLO). Due to an issue on the fmc-dio-5chttla FMC 5-channel Digital I/O module, input signals that are present on this FMC module prevent the SPEC7 power from starting up.
An "Ideal Diode" (LTC4358CDE#TRPBF) is placed in the FMC 12V power line to avoid backward current delivery via the FMC 12V.