The technician either desolders the FBGA-254 chip and places it in a dedicated socket or solders tiny wires to the motherboard using an ISP pinout.
I recently had the opportunity to work with the Km2v8001cm-b707 Firmware, and I must say, it's been a pleasant experience. The firmware has been designed to optimize the performance of the device, and it shows. Km2v8001cm-b707 Firmware