Re: HP 9470m Change MAC ADRESS

i had the same problem with 200 9470m, i sended them back to the seller.
try bios programming and dmi.
you have to remove the eeprom, program it with a new "blank" bios with uuid fffffffffffffff, solder back and use dmi to fix.
because you have 5 it may be cost effective to do it, but in my case with 200 laptops and wasn't worth it...!!! good luck.