Hello everyone!

I am trying to fix an old Intel D5400XS (Skulltrail) motherboard, which gets stuck in a loop on error post code 29 after successfully initialising the RAM and before the next code that is supposed to enumerate the PCI buses (post code 50).

I should point out that absolutely everything has been tested so far: resetting the BIOS, booting with a single CPU (cross-testing), with a single RAM module (each module tested), changing the power supply, changing the graphics card, disconnecting all peripherals... and that all the components work perfectly on another...