iPhone 4 (GSM/AT&T) Screen Replacement
This procedure details how to substitute the iPhone's display assembly, encompassing the front glass, digitizer, and LCD panel. Note that the LCD is permanently bonded to the glass during manufacturing, and attempting to separate them will result in damage.
- To prevent surface damage to the newly installed display, apply a screen protector.
Step 1 | Rear Panel
To start the repair, ensure the iPhone's battery has a charge level of less than 25%; a fully charged lithium-ion battery presents a fire and/or explosion hazard if damaged.
To prevent electrical shock or damage, ensure the iPhone is completely de-energized prior to starting the repair process.
The iPhone 4's back panel is secured with either two #000 Phillips head screws or Apple's proprietary 5-point Pentalobe screws—refer to the second image to identify the screw type present. Using the appropriate screwdriver is essential for successful removal.
Using either a Pentalobe or Phillips #000 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the Pentalobe driver is fully engaged before turning when removing those screws.
To prevent electrical shock or damage, ensure the iPhone is completely de-energized prior to starting the repair process.
The iPhone 4's back panel is secured with either two #000 Phillips head screws or Apple's proprietary 5-point Pentalobe screws—refer to the second image to identify the screw type present. Using the appropriate screwdriver is essential for successful removal.
Using either a Pentalobe or Phillips #000 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the Pentalobe driver is fully engaged before turning when removing those screws.
Step 2
Apply pressure to the back cover, directing it upwards against the device's upper boundary.
Expect a displacement of approximately 2 millimeters.
Expect a displacement of approximately 2 millimeters.
Step 3
To release the rear panel, either gently separate it from the iPhone casing by applying pressure with your fingers or secure a Small Suction Cup to the panel and lift.
Exercise caution to avoid harming the plastic clips affixed to the back cover.
Before attaching a replacement rear panel, peel away the adhesive backing from the protective plastic covering the camera lens’s internal surface, and also remove the sticker adhered to the large black area positioned close to the lens.
Exercise caution to avoid harming the plastic clips affixed to the back cover.
Before attaching a replacement rear panel, peel away the adhesive backing from the protective plastic covering the camera lens’s internal surface, and also remove the sticker adhered to the large black area positioned close to the lens.
Step 4 | Battery
Using a Phillips screwdriver, detach the battery connector from the logic board by unscrewing the one 2.5 mm screw that holds it in place.
Certain models incorporate a second screw; this secures the contact pad positioned directly above the screw highlighted in red within the accompanying image.
Certain models incorporate a second screw; this secures the contact pad positioned directly above the screw highlighted in red within the accompanying image.
Step 5
Carefully lift the battery connector away from its connection on the logic board using a plastic opening tool.
To avoid connector damage, release the bracket by gently separating it from the top and bottom surfaces; side access is limited.
Exercise extreme caution when releasing the battery connector, ensuring you apply force only to the connector itself, as applying pressure to the logic board's socket risks irreversible damage.
Carefully detach the metal clip, which secures the antenna connector.
To avoid connector damage, release the bracket by gently separating it from the top and bottom surfaces; side access is limited.
Exercise extreme caution when releasing the battery connector, ensuring you apply force only to the connector itself, as applying pressure to the logic board's socket risks irreversible damage.
Carefully detach the metal clip, which secures the antenna connector.
Step 6
- Carefully extract the battery from the iPhone by utilizing the provided transparent plastic tab to apply gentle upward pressure.
Should the retaining tab fracture prior to battery separation, introduce several drops of isopropyl alcohol with a concentration exceeding 90% beneath the battery's edge. Allow approximately one minute for the solvent to degrade the adhesive bond, then gently insert a spudger beneath the battery tab to disengage the adhesive.
To avoid damage, do not force the battery removal; instead, if adhesive resistance persists, add additional drops of alcohol to soften it. Ensure the pry tool does not puncture or bend the battery during the process.
To prevent damage, ensure all traces of the alcohol solution are removed by wiping with a clean cloth or permitting complete evaporation before proceeding with the new battery installation.
Carefully detach the protective plastic packaging from the new battery by gently separating it from the ribbon cable.
Ensure the red contact clip is correctly situated adjacent to the battery connector prior to reattaching the battery connector.
To prevent wireless interference, thoroughly remove any residue from surfaces that will touch other metal components using a cleaning agent like Windex.
Following reassembly, execute a complete system reset to proactively avoid potential problems and streamline any subsequent diagnostic procedures.
Step 7 | Logic Board
- Employing a SIM card eject tool or a straightened paperclip, release the SIM card and its tray from the device.
Applying considerable pressure might be necessary.
Using a compatible tool, extract the SIM card tray, then carefully take out the SIM card and set both aside.
Step 8
- Using a screwdriver, detach the two screws.
Use a Phillips screwdriver with a 1.2 mm tip.
Use a Phillips screwdriver, size 1.6 mm. - Carefully detach the slender steel cover protecting the dock connector cable inside the iPhone.
To prevent wireless interference, thoroughly remove any oils from the dock connector cable cover's metal contact areas using a de-greaser like Windex prior to reassembling the device.
Step 9
- Carefully lift the dock cable connector's two terminals away from the logic board using an iPod opening tool, applying gentle force to each end.
Step 10
- Detach the dock ribbon cable from both the logic board and the lower speaker enclosure, exercising caution to avoid damage.
Carefully detach the dock ribbon cable from the logic board, avoiding any strong pulling that could damage it.
Step 11
Carefully lift the lower antenna connector from its socket on the logic board using a plastic opening tool.
Step 12
Using a Phillips screwdriver, detach the logic board from the inner case by unscrewing the 1.9 mm screw located at its base.
Step 13
Using the Phillips #0 screwdriver, detach the five screws that fasten the Wi-Fi antenna assembly to the logic board.
Ensure proper reinstallation of the 4.8 mm Philips screw during reassembly, as it serves as the Wi-Fi antenna ground and is frequently responsible for poor Wi-Fi signal strength following repairs.
- Use a Phillips screwdriver with a 2.3 mm tip.
- Use Phillips head screwdrivers with a 1.6 mm tip.
- Use a Phillips screwdriver with a 1.4 mm tip.
- Use a Phillips screwdriver with a 4.8 mm tip.
Ensure proper reinstallation of the 4.8 mm Philips screw during reassembly, as it serves as the Wi-Fi antenna ground and is frequently responsible for poor Wi-Fi signal strength following repairs.
Step 14
Carefully separate the Wi-Fi antenna from the logic board by gently prying the top edge upwards with an iPod opening tool.
Carefully detach the Wi-Fi antenna from its secure position on the inner frame by gently levering the retaining clips outward with a spudger tip.
To maintain proper Wi-Fi functionality, carefully detach the antenna during disassembly, and be certain to retain both the two metal clips located on the cover's top edge, as well as the 4.8mm screw securing it; loss of these components is the most common cause of degraded Wi-Fi performance following device reassembly.
To prevent potential wireless interference, thoroughly remove any oils from the metal surfaces where the connector cover makes contact using a de-greaser like Windex; however, avoid applying the de-greaser directly to the connector pins themselves.
Carefully detach the Wi-Fi antenna from its secure position on the inner frame by gently levering the retaining clips outward with a spudger tip.
To maintain proper Wi-Fi functionality, carefully detach the antenna during disassembly, and be certain to retain both the two metal clips located on the cover's top edge, as well as the 4.8mm screw securing it; loss of these components is the most common cause of degraded Wi-Fi performance following device reassembly.
To prevent potential wireless interference, thoroughly remove any oils from the metal surfaces where the connector cover makes contact using a de-greaser like Windex; however, avoid applying the de-greaser directly to the connector pins themselves.
Step 15
Employing an iPod opening tool, gently raise the rear camera connector from its socket on the logic board.
Carefully detach the rear camera assembly.
Carefully detach the rear camera assembly.
Step 16
Carefully peel away the small, round, white label—which contains both the warranty validation and water damage indicator—that obscures the screw positioned close to the battery release lever.
Carefully peel back the sticker to access and unscrew the 2.4 mm Phillips screw located beneath it.
Carefully peel back the sticker to access and unscrew the 2.4 mm Phillips screw located beneath it.
Step 17
Carefully lift each of the specified connectors from their corresponding sockets on the logic board, employing the edge of a plastic opening tool to avoid damage.
- Carefully disengage the digitizer cable by applying upward pressure from beneath.
- Carefully release the LCD cable by gently levering it upward from its lower edge.
- Carefully separate the headphone jack and volume button cable assembly from the device's top surface using a prying tool.
- Carefully detach the microphone/sleep button cable by gently levering it away from the top assembly.
- Carefully disengage the front camera cable by applying prying force from its upper edge.
Step 18
Using the appropriate tool, detach the 4.8 mm standoff screw positioned close to the headphone jack.
To detach standoff screws, utilize a screwdriver or bit specifically designed for standoff applications.
If a dedicated tool isn't available, a small flathead screwdriver can be substituted; however, exercise heightened care to prevent slippage and potential harm to nearby parts.
To ensure proper alignment, the Wi-Fi shield, previously detached in step 13, must be positioned at the correct height using this standoff during reassembly; failure to adequately tighten the standoff will prevent the rear cover from sliding into place in step 2 because the shield will protrude beyond the frame's surface, and the shield’s exterior must be level with the headphone jack.
To guarantee proper alignment during reassembly, position the motherboard's edge beneath the designated standoff, as indicated by the circle, to allow for screw installation.
Confirm the tiny rubber spacer, positioned atop the motherboard, is correctly installed during reassembly.
Absence of this component risks damage to the surrounding ribbon cables on the motherboard.
To detach standoff screws, utilize a screwdriver or bit specifically designed for standoff applications.
If a dedicated tool isn't available, a small flathead screwdriver can be substituted; however, exercise heightened care to prevent slippage and potential harm to nearby parts.
To ensure proper alignment, the Wi-Fi shield, previously detached in step 13, must be positioned at the correct height using this standoff during reassembly; failure to adequately tighten the standoff will prevent the rear cover from sliding into place in step 2 because the shield will protrude beyond the frame's surface, and the shield’s exterior must be level with the headphone jack.
To guarantee proper alignment during reassembly, position the motherboard's edge beneath the designated standoff, as indicated by the circle, to allow for screw installation.
Confirm the tiny rubber spacer, positioned atop the motherboard, is correctly installed during reassembly.
Absence of this component risks damage to the surrounding ribbon cables on the motherboard.
Step 19
Detach the iPhone's logic board with caution, being sure to avoid snagging any connected cables.
Exercise caution to avoid harming the delicate, gold-colored projection—identified by a red mark and located close to the upper section—due to its vulnerability.
During reassembly, ensure the lower antenna cable remains clear of the logic board to prevent damage or pinching.
Exercise caution to avoid harming the delicate, gold-colored projection—identified by a red mark and located close to the upper section—due to its vulnerability.
During reassembly, ensure the lower antenna cable remains clear of the logic board to prevent damage or pinching.
Step 20 | Speaker Enclosure Assembly
Using a Phillips screwdriver, detach the speaker enclosure from the inner frame's side by unscrewing the single 2.4 mm screw that holds it in place.
Step 21
- Carefully detach the iPhone's speaker housing.
- Ensure the four electromagnetic interference fingers are positioned beneath the LCD frame's edge prior to securing the speaker enclosure to the inner frame.
- To prevent wireless interference, use a de-greaser like Windex to thoroughly clean all metal surfaces where the EMI fingers meet the internal frame, and the brass screw mounting location, as these are critical metal-to-metal contact points. Finger oils can negatively impact wireless performance.
Step 22 | Display Assembly
- Detach the vibrator from the inner frame by unscrewing the two fasteners.
- Use a Phillips screwdriver, size 6 mm.
- Use a Phillips screwdriver with a 1.4 mm tip.
- Carefully detach the iPhone's vibrator component.
Step 23
- Using a Phillips screwdriver, detach the front panel by unscrewing the 1.5 mm screw located close to the headphone jack.
Step 24
- Using a Phillips screwdriver, detach the three 1.5 mm screws located on the iPhone's volume button side.
- Ensure each screw is replaced with its corresponding washer during reassembly.
- Instead of completely removing the screw-and-washer sets, you may find it feasible to simply ease the 1.5 mm Phillips screws with large heads a bit, although this step requires care.
Step 25
- Using a Phillips screwdriver, detach the 1.5 mm screw located close to the lower microphone.
Step 26
Using a Phillips screwdriver, detach the 1.5 mm screw located close to the ribbon cable connected to the dock connector.
Step 27
Using a Phillips screwdriver, detach the three 1.5 mm screws located on the iPhone's SIM card edge.
Ensure each screw is replaced with its corresponding washer during reassembly.
Carefully easing the 1.5 mm Phillips screws, which have large heads, slightly can offer an alternative to complete removal and replacement of the screw-and-washer assembly, though this step requires finesse.
Using a Phillips screwdriver with a 1.5 mm bit, take out the screw that was already detached and is located close to the rear camera.
Ensure each screw is replaced with its corresponding washer during reassembly.
Carefully easing the 1.5 mm Phillips screws, which have large heads, slightly can offer an alternative to complete removal and replacement of the screw-and-washer assembly, though this step requires finesse.
Using a Phillips screwdriver with a 1.5 mm bit, take out the screw that was already detached and is located close to the rear camera.
Step 28
Using an iPod opening tool, gently slide the tip into the gap located where the rubber bezel meets the steel frame surrounding the front glass.
Avoid forcing the tool in a space located between the glass component and the rubber bezel.
Using gentle, controlled force, separate the front panel assembly's top edge from the steel inner frame.
Avoid forcing the tool in a space located between the glass component and the rubber bezel.
Using gentle, controlled force, separate the front panel assembly's top edge from the steel inner frame.
Step 29
Carefully separate the front panel assembly's upper edge from the steel inner frame, applying minimal force.
Carefully pivot the front panel assembly outward, away from the steel inner frame, observing for a slight separation from the adhesive located beneath the home button.
Carefully slide a spudger into the uppermost section of the housing, then gradually maneuver it along the perimeter, applying minimal outward force.
Gently separate the lower section of the front panel assembly from the steel inner frame, ensuring no force is applied.
Exercise caution; adhesion between the home button and the front panel could damage the home button cable, potentially causing it to tear.
Care must be taken to avoid separating the front glass entirely from the frame, as this action could harm the digitizer cable.
Because a cracked glass panel—a common condition during replacement—is prone to flexing and releasing tiny fragments when detached, secure the front surface with clear tape as a precaution. Conduct the panel removal process directly above a waste receptacle, and wear eye protection.
Carefully pivot the front panel assembly outward, away from the steel inner frame, observing for a slight separation from the adhesive located beneath the home button.
Carefully slide a spudger into the uppermost section of the housing, then gradually maneuver it along the perimeter, applying minimal outward force.
Gently separate the lower section of the front panel assembly from the steel inner frame, ensuring no force is applied.
Exercise caution; adhesion between the home button and the front panel could damage the home button cable, potentially causing it to tear.
Care must be taken to avoid separating the front glass entirely from the frame, as this action could harm the digitizer cable.
Because a cracked glass panel—a common condition during replacement—is prone to flexing and releasing tiny fragments when detached, secure the front surface with clear tape as a precaution. Conduct the panel removal process directly above a waste receptacle, and wear eye protection.
Step 30
Carefully guide the digitizer and LCD cables through the iPhone’s internal steel frame, then detach the display assembly.
Ensure the digitizer and LCD data cables are free from kinks and properly routed through the opening in the steel frame during display reinstallation; a folded digitizer cable, as demonstrated in this image of an improper installation, must be avoided.
Verify proper front panel installation by observing that the LCD and digitizer cables are aligned and of equal length, mirroring the arrangement depicted in the provided reference image.
Ensure the digitizer cable is properly positioned to connect to its socket on the logic board; forceful manipulation risks tearing the cable. If it doesn't readily reach, detach the display assembly, carefully align the cable, and guide it completely into place, following the illustrated procedure.
To prevent LCD malfunctions during reassembly, avoid contact with the metal base of the LCD data cable; accidental contact requires gentle cleaning with an alcohol wipe prior to proceeding.
Ensure the digitizer and LCD data cables are free from kinks and properly routed through the opening in the steel frame during display reinstallation; a folded digitizer cable, as demonstrated in this image of an improper installation, must be avoided.
Verify proper front panel installation by observing that the LCD and digitizer cables are aligned and of equal length, mirroring the arrangement depicted in the provided reference image.
Ensure the digitizer cable is properly positioned to connect to its socket on the logic board; forceful manipulation risks tearing the cable. If it doesn't readily reach, detach the display assembly, carefully align the cable, and guide it completely into place, following the illustrated procedure.
To prevent LCD malfunctions during reassembly, avoid contact with the metal base of the LCD data cable; accidental contact requires gentle cleaning with an alcohol wipe prior to proceeding.
Step 31 | Screen
Before installation, if a colored plastic protective layer is present on the rear of the new LCD, carefully remove it by grasping the pull tab located close to the home button.
The replacement front panel assembly might require transferring the earpiece grille and the surrounding clear plastic ring from the original assembly, as these components are not always included with the new part, depending on the supplier.
To prevent display issues potentially caused by static electricity, thoroughly wipe the touchscreen with an alcohol wipe following reassembly before powering on the iPhone.
To ensure proper initialization following reassembly, power on the iPhone by connecting it to standard AC power; after successful startup, the power connection can be removed.
To prevent surface damage, apply a fresh screen protector to the display following reassembly.
The replacement front panel assembly might require transferring the earpiece grille and the surrounding clear plastic ring from the original assembly, as these components are not always included with the new part, depending on the supplier.
To prevent display issues potentially caused by static electricity, thoroughly wipe the touchscreen with an alcohol wipe following reassembly before powering on the iPhone.
To ensure proper initialization following reassembly, power on the iPhone by connecting it to standard AC power; after successful startup, the power connection can be removed.
To prevent surface damage, apply a fresh screen protector to the display following reassembly.