jheronimus wrote:It's a Supermicro board. AFAIK the USA flag in the corner means it's a retail release. My other Supermicro board didn't have one.
No, the flag means that particular board was made in the USA.
Some where, some were made is Asia.
The USA and Asian versions actually have a different BIOS (at least the splash-screen).
MI_USA_.jpg
The BIOS fan controls disabled in the BIOS suggests that ACPI is turned off.
That does not explain why they aren't running at all, just why the settings are disabled.
There is a 'switch' in the BIOS to turn ACPI on. It's under "Power Management".
Choices are: APM, ACPI, or Disabled.
I dunno if it affects that board but some Supermicro BIOSes had a glitch where if you changed the power button setting to 'instant off' (or equivalent) it would turn ACPI off in the process. I think those all got fixed with BIOS updates but a Slot-1 board might have slipped through the cracks.
The last BIOS for that was R3.1.
I've been building a Supermicro BIOS archive and I already have that one if you need it.
The fan transistors are individual (one for each fan) and located right next to the associated fan header.
As they are ALL not working that isn't the most likely suspect.
More likely is some small SMD component between the Super-I/O and those transistors such that the transistors aren't turning on.
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