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So I found clean BIOS, cleaned ME, reset PRAM, Tried to fix checksum with MEDUSA but it still tells me Fsys not found. I plugged the Medusa into 5 other machines and it shows the Fsys but this one is still not showing it. I'm wondering if the SPI ROM is no good.
Yes there is a huge difference! You cannot just swap the chip lol the ME region has to be good and the FSYS block. If you are unable to do so, I'm sure people on here would be more than happy to help you fix the BIOS dump
So I got a copy of a BIOS from a working machine, copied it to my Medusa 2, wrote it to the machine missing the serial without changing the serial number and the machiine worked. Then I took the same dump, change the password to the password of the "broken" machine, then had the medusa fix the checksum and clean the ME. The damned computer would turn on but the screen would not come on. I could see the fan spin and how much current it was drawing but no "bong" and no image. So just to check that I didn't brick the computer I put the original BIOS back on and the machine is now back to working as normal without a serial number. So weird how by putting a BIOS copy from a known working machine into this machine would make it work and show a serial number, yet all I did was change the serial number from the same dump and fix the checksum and it stopped working. I also must note that I did a PRAM reset too.
I just don't get it. I can copy the BIOS from another machine to the broken one and it will work. But if I try to change the serial number on the same dump, fix the Fsys and clean the ME the computer will come on but the screen will not fire up. I am obviously missing something or a step.