Supermicro H12DSi-N6 does not boot

[Harmony]

indeed, can be PSU.
ff = is not a valid code, its the init value after reset.

Don't think it's PSU another board works fine off it. I also tried multiple PSU 500w and 750w

Last thing I tried was upgrade BMC/BIOS firmware BMC worked but BIOS still shows as 2.3 should be 2.4 https://i.gyazo.com/931f72a353d006b56b8baad2a57271f8.png error code still ff

Now I will leave it until I get another MB to test with unless you or anyone else has some ideas

 

[RolloZ170]

Last thing I tried was upgrade BMC/BIOS firmware BMC worked but BIOS still shows as 2.3 should be 2.4

same as inventory. IPMI can not see what BIOS is booted. you will see 2.4 after successful POST.

 

[Harmony]

Does these boards boot with no RAM/CPU?

 

[RolloZ170]

Does these boards boot with no RAM/CPU?

maybe it beeps al lot with no memory, but who should execute x86 code of BIOS if not CPU ?