49Lenovo ideapad 320-17AST/ideapad 320H-17AST/ideapad 320L-17AST/ideapad320R-17AST/ideapad 320E-17AST/ideapad 320-17ABR/ideapad 320H-17ABR/ideapad 320L-17ABR/ideapad 320R-17ABR/ideapad 320E-17ABR1090 ODD transfer board, backup battery and FingerprintboardFor access, remove these FRUs in order:• “1010 Optical drive” on page 33• “1020 Base cover” on page 34• “1030 Battery pack” on page 37• “1040 PCI Express Mini Card for wireless LAN” on page 39• “1050 DIMM” on page 41• “1060 Hard disk drive” on page 42• “1070 Speakers” on page 44• “1080 Fan assembly and Heat Sink assembly” on page 45Figure 9. Removal steps of ODD transfer board, backup battery and FingerprintboardDetach the system board connector in the directions shown by arrows 1 and 2.Unplug the backup battery connector in the direction shown by arrow 3.Remove the screw 4. Remove the ODD transfer board in the direction shownby arrow 5.edbacStep Screw (quantity) Color Torque4 M2 × 3 mm, Phillips-head, nylok-coated (1) Silver 1.85+/-0.15 kgf/cmWhen installing: Make sure that the connectors are attached firmly.