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PS5 BIOS Reconstruction Without Original Dump – Is It Possible?

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asdrubale

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Hello, I received a PS5 that unfortunately has some missing components. The previous technician probably couldn’t identify the fault. I managed to find the issue, but unfortunately the BIOS chip has been removed.

My question is: without a valid original dump, is it possible to reconstruct the BIOS? In the past, I have successfully rebuilt PS5 BIOS files and can recreate almost everything, but I get stuck when it comes to the LAN MAC address and the checksum, which are usually taken from the original dump.


Is there any way to work around this issue and still successfully reconstruct the BIOS?
 
I replaced the faulty components and rebuilt the BIOS using the LAN MAC address and checksum from a donor board, but I’m still getting 3 beeps! Something isn’t right. What could be causing it?
 
I haven’t performed the UART read yet. I’m currently using a known-good dump from a 1215B 61G, while my board, which is missing the BIOS chip, is a 1216A 61G. Do you think this could be the problem?

That said, I’ll get a dump for a 1216A 61G. Will it be possible to get it to boot?
Post automatically merged:

stetofix said:
Did you check UART error codes?
Click to expand...
Thank you @stetofix for the valuable advice. The board is now booting again.

I still don't understand why they removed the BIOS chip from this board. In addition to that, they had also removed a Panasonic chip, taken a working optical drive lens, and replaced a functioning power supply with a faulty one destined for scrap. It had basically been turned into a piece of junk.

P.S. It has firmware version 10.20.
 
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