Normally I dont take these in. This guy i know hes a good client he found this in a hotel room while vacationing... It has an efi password obviously he wants to reformat to give away or use. Any help here?
Pull the chip from the board and plug it up to the programmer. I have used a different BIOS chip but you'll have to solder some little legs on to the Pro Retina BIOS chip because it's a WSON8 package.
Once you’re plugged in open the MiniPro app (comes with the TL866) and select 25 flash detect.
Click detect It will give you a short list of possible chips so just match it to the part number on your chip.
When it’s done reading the file from the chip the cancel button will no longer be greyed (greyed?) out. So click cancel.
Then save the file to you desktop. It will save as a .bin file. Call it BIOS1.bin
Read the chip a second time and save the file as BIOS2.bin so if you fuck something up you have a backup file.
Right click and select fill section
Then fill with FF. And click OK.
There may be several instances of $SVS so check.
Do the same again and after any instances of $SVS just fill the little bit of code after it with FF. What you edited will show up red.
Save the file as unlocked.bin
Now erase your BIOS chip from the drop down as before when you read the chip
Once it has finished erasing do a blank check from the same dropdown.
Once it has varified the chip is blank just open your unlocked.bin and flash it back to the chip with the program option from the same dropdown as the above image.
Slap the chip back on the board.
Power in and PRAM reset.
Boot into an installer USB and erase the SSD.
Install a clean OS.
But failing all that you could just buy a chip from eBay for $25. eBay for 820-xxxx BIOS CHIP and slap one of those on there.
Here is one for the 820-4924