__ 9. Remove the back cover. Refer to “Remove the side and back cover” onpage 69.__ 10. Remove the right side cover (two thumbscrews).__ 11. Remove the left side cover (two screws).__ 12. Remove the top cover (two screws). Slide the top cover back and lift up.__ 13. If possible, use a wrist strap to prevent electrostatic discharge fromdamaging your hardware. If you do not have a wrist strap, touch a metalsurface of the system or expansion unit before installing or replacinghardware.If you received the 2209 Disposable Wrist Strap, follow these steps:__ a. Attach the disposable wrist strap. View video.__ b. When you unroll the strap, remove the liner from the copper foil atthe end.__ c. Attach the adhesive part of the copper foil to an exposed, unpaintedmetal surface on the frame of the unit.Note: Follow the same precautions you would use without the wrist strap.The 2209 Disposable Wrist Strap is for static control. It will notincrease or decrease your risk of receiving electric shock when usingor working on electrical equipment.__ 14. Did you receive a 2757, 2763, 2782, 4748, 4778, 5703, or 5705 IOA card?If no, go to step 25 on page 49.If yes, use the following table to determine where to install the IOA card.Card received Current positionC01Action needed2763 or 2782, 5703, or57059767 Install 2763, 2782, 5703, or 5705 in position C022763 Install new 2763, 2782, 5703, or 5705 in positionC022757, 4748, 4778 9767 Remove 9767 and install 2757, 4748, or 4778 inposition C012763 Remove 2763 and install 2757, 4748, or 4778 inposition C01__ 15. Locate the adapter card positions inside your system unit.__ 16. Does your unit have screws to secure the cards?46 43xx Disk Unit, 71xx Disk Expansion Unit, 71xx Disk Unit Enclosure V5R3