Check the listing for details. EFI BIOS CHIP: APPLE MACBOOK PRO A1278 Logicboard: 820-2936-B. Condition: New. Listed at 17.45 USD. BIOS DEPOT Your reliable BIOS source ! * Brand new pre-programmed chip * 100 % verified programming * Comprehensive technical support * Fast shipping (Chip to be soldered on board) This item is a brand new pre-programmed BIOS EFI firmware chip for the Apple model in the title of this auction item. The bios chip will be programmed with a working EFI firmware released from Apple. This chip has to be soldered on board. This item can be used for the following purposes: (1) to fix a corrupt (bricked) EFI firmware bios chip. (2) to remove EFIfirmware pass-word (it will NOT remove the OS pass-word). **Before purchase, please make sure the specifications of your model match the listing title, including the MacBook model and logic board ** Please feel free to ask questions. Warranty : Guaranteed No DOA(Dead/Defective on Arrival); Guaranteed replacement if defective within 1 year Return policy: If the returned item is used, it is subject to a 10% restocking fee. (No restocking fee will be charged if the returned item is not used). Powered by SixBit's eCommerce Solution