Seller: newkcomputer ✉️ (2,755) 100%, Location: Brooklyn, New York, US, Ships to: US, CA, Item: 252527383327 BIOS EFI firmware chip: A1311 Apple iMac 21.5" i5 2.5G EMC 2428 MID 2011. Factory Level Bios File Programming(Not Back Up Files). Fix corrupted Bios (bricked or failed). Remove EFI password/EFI lock(NOT OS PASSWORD). 100% verified and tested working. Technical supports. NEW.K COMPUTER BRAND NEW Factory Level Bios IC FEATURES 100% brand new IC,never been used Factory Level Bios File Programming(Not Back Up Files) 100% verified and tested working Technical supports Fast shipping:same day or 1 day handling Specifications Good for models: Check listing title,make sure board part number 100% matched Fix corrupted Bios (bricked or failed) Remove EFI password/EFI lock(NOT OS PASSWORD) CONTENTS Brand New BIOS IC Warranty & Condition 30 days Money back,15% restocking fees for IC that had been soldered(been used) Shipping Information USPS first class mail USPS Priority Mail (extra shipping cost) Payment Information PayPal is the preferred method of payment. MESSAGE US IF YOU HAVE ANY QUESTIONS! Condition: New, Brand: Unbranded/Generic, Type: BIOS Chip