HP 21-b All-in-One ENERGY STAR Product End-Of-Life Disassembly Instructions page 6

11. Release Antenna from WIFI module and release 1 screw to remove WIFI module.
12. Remove HDD cable and HDD (2 screws), and release 4 screw for removing HDD BKT.
13. Remove HDD cable & release 4 screws to remove HDD BKT from HDD.
EL-MF877-00 Page 6
Template Revision C
Last revalidation date 04-01-2018
HPI instructions for this template are available at EL-MF877-01