Hi.
There is DV15 that powers on and off for a 2-3 seconds. seems that all cores produced(except CPU core). By picking Up 1.05v Coli satys power on. seems there is short or bad circuit on 1.05V power rail and hub seems broken. Hub is BD82HM57 and question is can replace with BD82HM55? Is it possible and need to modify BIOS?

Is highly probably that will work.

Here we have a image with the comparative between them

http://elpais.comwww.noticias3d.com/art ... info14.jpg

may be need to change SKU type of PCH in bios by FIT.