Step 1. Before disassembling your iPhone, be sure it is powered off. Your iPhone 4s rear cover may have either two #000 Phillips screws or Apple's 5-Point "Pentalobe" screws (second image). Check which screws you have, and ensure you also have the correct screwdriver in order to remove them.
Step 2. Push the rear panel toward the top edge of the iPhone.
Step 3. Pinch the rear panel with your fingers and lift it away from the iPhone. Alternatively, use aSmall Suction Cup.
Step 4. Remove the single 2.5 mm Phillips screw securing the battery connector to the logic board.
Step 5. Use a plastic opening tool to gently pry the battery connector up from its socket on the logic board.Remove the metal clip covering the antenna connector.
Step 6. Use the clear plastic pull tab to gently lift the battery out of the iPhone.Remove the contact clip from the iPhone.
Step 7. Use a SIM card eject tool or a paperclip to eject the SIM card and its holder.Remove the SIM card and its holder.
Step 8. Remove the following two screws: One 1.2 mm Phillips One 1.6 mm Phillips Remove the thin steel dock connector cable cover from the iPhone.
Step 9. Use an iPod opening tool to gently pry the dock cable connector up off the logic board from both short ends of the connector.
Step 10. Carefully peel the dock ribbon cable off the logic board and the lower speaker enclosure.
Step 11. Use a plastic opening tool to pry the lower antenna connector up off its socket on the logic board.
Step 12. Remove the 1.9 mm Phillips screw securing the bottom of the logic board to the inner case.
Step 13. Remove the following five screws securing the Wi-Fi antenna to the logic board: One 2.3 mm Phillips Two 1.6 mm Phillips One 1.4 mm Phillips One 4.8 mm Phillips
Step 14. Use an iPod opening tool to slightly lift the top edge of the Wi-Fi antenna away from the logic board. Use the tip of a spudger to pull the Wi-Fi retaining clips away from the inner frame. Remove the Wi-Fi antenna from the iPhone. Make sure you don't lose the metal clips on the top of the cover where the 4.8mm screw attaches or the 4.8mm screw. That's the primary reason for abnormal Wi-Fi performance after the reassembly.
Step 15. Use an iPod opening tool to carefully lift the rear camera connector up off its socket on the logic board. Remove the rear camera.
Step 16. Remove the small circular white sticker (warranty sticker and water indicator) covering the screw near the battery pull tab. Remove the 2.4 mm Phillips screw that was hidden underneath the sticker.
Step 17. Use the edge of a plastic opening tool to gently pry the following connectors up and out of their sockets on the logic board: Digitizer cable (pry from bottom) LCD cable (pry from bottom) Headphone jack/volume button cable (pry from top) Top Microphone/sleep button cable (pry from top) Front camera cable (pry from top)
Step 18. Use a small flathead screwdriver to remove the 4.8 mm standoff near the headphone jack.When reassembling the motherboard, ensure that its edge sits under the circled standoff, otherwise the screws will not fit. When reassembling ensure that the small rubber spacer attached to the top of the motherboard is in place. Without this part the motherboard could damage the ribbon cables around it.
Step 19. Carefully remove the logic board from the iPhone, minding any cables that may get caught.
Step 20. Remove the single 2.4 mm Phillips screw securing the speaker enclosure to the side of the inner frame.
Step 21. Remove the speaker enclosure from the iPhone.
Step 22. Remove the following two screws securing the vibrator to the inner frame: One 6 mm Phillips One 1.4 mm Phillips Remove the vibrator from the iPhone.
Step 23. Remove the 1.5 mm Phillips screw securing the front panel near the headphone jack.
Step 24. Remove the three large-headed 1.5 mm Phillips screws along the volume button side of the iPhone.
Step 25. Remove the 1.5 mm Phillips screw near the lower microphone.
Step 26. Remove the 1.5 mm Phillips screw near the dock connector ribbon cable.
Step 27. Remove the three large-headed 1.5 mm Phillips screws along the SIM card side of the iPhone.Remove the small-headed 1.5 mm Phillips screw near the rear camera.
Step 28. Carefully insert the edge of an iPod opening tool between the rubber bezel around the front glass panel and the steel inner frame. Do not attempt to insert the tool between the glass and the rubber bezel. Carefully pry the upper edge of the front panel assembly away from the steel inner frame.
Step 29. Slowly and gently lift the top edge of the front panel assembly away from the steel inner frame. Continue to rotate the front panel assembly away from the steel inner frame until it slowly begins to peel off the adhesive applied below the home button area. It may be easiest to insert a spudger at the top and work it around the edges, spreading gently as you go. Carefully pull the lower edge of the front panel assembly away from the steel inner frame.
Step 30. De-route the digitizer and LCD cables through the steel inner frame, and remove the display from the iPhone.When the front panel has been correctly installed, both the LCD and digitizer cables should be immediately next to one another and should be the same length, as shown in the second photo.During reassembly, do not touch the metallic area at the base of the LCD data cable, as this can cause problems with the LCD. If you do touch it accidentally, clean it gently with an alcohol wipe before continuing.
Step 31. Your replacement display may come with colored plastic film on the back of the LCD. If so, use the pull tab near the home button to peel the plastic film from the LCD before installing the new display in your iPhone. After reassembly, clean the touchscreen surface with an alcohol wipe prior to turning the iPhone back on. The alcohol helps dissipate any lingering static electricity, which can cause problems with the display. After reassembly, protect your new display from any scratches by installing a newscreen protector.
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