For $29/mo, we provide access to advanced level technicians who will answer your questions on any Macbook board related matter to the best of their knowledge promptly & walk you through how to solve your problem so you can deliver a working board to your customer.
Thanks for your reply. I have never tried to read or write BIOS chip on mac. So will need to do some research first. Which tool do you recommend for iMac? Thanks!
Medusa is a must have tool for Apple repairs.
It can work onboard with all machines which have a connector for SPI lines.
If not, SPI chip (BIOS) should be removed and placed in a proper adapter.
Medusa 3 has Pomona clip to attach directly on a SOP-8 chip onboard.
Many mentions available on the forum about this tool...