Hello again,
i'm still trying to find why the motherboard don't boot up so i started to follow better the tracks on the board.
I have found that the output of the 2 roms is splitted at least in two. One lane goes to the pins on the chipset near TACT 82301PB the processor and the other lane goes to a pin of a chip of the memory
I totally have no idea why. Can someone explain that? it's common? I never followed tracks on motheboard so i don't know if it's normal or no.

Thanks at who will asnwer.