iPhone 4S Home Button Gasket Replacement - iPhone 4s

Step 1 | Rear Panel

To prevent potential fire or explosion hazards during the repair process, ensure the iPhone's lithium-ion battery is depleted to less than 25% capacity prior to starting. A fully charged battery poses a significant risk of ignition if damaged.
To prevent electrical shock or damage to components, ensure the iPhone is completely de-energized prior to starting the repair process.
Using a Pentalobe P2 screwdriver, detach the two screws measuring 3.6 mm located adjacent to the dock connector.
To prevent damage, ensure the driver is fully engaged before unscrewing the Pentalobe fasteners, as they are prone to stripping.

Step 2

Apply pressure to the back cover, directing the force upwards towards the top edge of the device.
Expect a displacement of approximately 2 millimeters.

Step 3

Carefully detach the rear panel from the iPhone's back casing, taking precautions to avoid breakage of the plastic clips affixed to the panel.
Carefully detach the iPhone's back cover.

Step 4 | Battery

Using appropriate tools, detach the battery connector from the logic board by unscrewing the specified fasteners.
Use a PH00 Phillips screwdriver to loosen and remove a 1.7-millimeter screw.
Use a PH00 Phillips screwdriver to loosen and remove a 1.5 mm screw.

Step 5

Gently disengage the pressure contact from the battery connector by sliding it clear of its retaining location.
Disconnect the pressure contact.

Step 6

Carefully disconnect the battery connector from its corresponding socket on the logic board by leveraging a plastic opening tool.
Using the tool, gently separate the connector's metal cover from the loudspeaker enclosure by raising the connector's lower edge.
To detach the battery connector, move it straight up away from the logic board; avoid any lateral pressure.
Avoid applying force directly to the battery connector's housing, as it is secured to the logic board with four tiny solder joints that are prone to separation.

Step 7 | Reassembly tip

Ensure the pressure contact is correctly situated during reassembly, resting atop the designated Philips screw post and orienting the gold contact to face the battery connector.
To prevent wireless interference caused by oils from handling, thoroughly wipe the pressure contact using a cleaning agent like Windex or isopropyl alcohol.

Step 8

Using a plastic opening tool, gently slide the tip into the gap separating the battery from the iPhone's outer casing, positioning the tool close to the device's lower edge.
Using the plastic opening tool, carefully work along the right side of the battery, lifting it incrementally at multiple locations to release the adhesive holding it in place within the outer case, ensuring complete separation.
To loosen a firmly adhered battery, carefully introduce a small quantity of isopropyl alcohol with a concentration exceeding 90% beneath its perimeter.
Allow approximately 60 seconds for the isopropyl alcohol to reduce the bond strength of the adhesive.
Carefully raise the battery using the flat, plastic tip of a specialized opening tool.
To avoid damage, do not use excessive force when removing the battery. If the adhesive is still holding, add additional alcohol drops to loosen it. Ensure the pry tool does not damage or penetrate the battery's casing during removal.
To prevent damage, ensure any residual alcohol solution is completely removed by wiping or by letting it evaporate fully prior to battery installation.

Step 9

Gently lift the battery from its adhesive backing by grasping the visible, transparent plastic tab.
Exercise caution when drawing back the plastic pull tab, as excessive force may cause it to tear.
Disconnect the power source by detaching the battery.
Carefully detach the protective plastic covering from the new battery by gently separating it from the ribbon cable.
Prior to phone installation, gently form the battery's included cable to match its intended contours.
To confirm correct positioning during battery replacement, briefly attach the battery connector to the device; after securing the battery with adhesive, detach the connector.
Following reassembly, execute a complete system reset to proactively avoid potential problems and streamline any subsequent diagnostic procedures.

Step 10 | Dock Connector Cable

Using a Phillips screwdriver, detach the dock connector cable cover from the logic board by unscrewing all screws holding it in place.
Use a Phillips screwdriver to remove a single screw with a 1.5 mm head.
Use a Phillips screwdriver to tighten a single screw measuring 1.2 millimeters.
Carefully detach the metal cover protecting the dock connector cable.

Step 11

Carefully lift the dock cable connector from its corresponding socket on the logic board, employing the thin edge of a plastic opening tool for leverage.

Step 12

Carefully detach the dock connector cable from both the adhesive holding it to the logic board and the adhesive securing it to the speaker enclosure's side.

Step 13

Carefully lift the cellular antenna cable connector from its corresponding socket on the logic board, utilizing the edge of a plastic opening tool for leverage.
Carefully maneuver the cellular antenna cable, freeing it from the metal finger retainers secured to the logic board.

Step 14 | Rear Camera

Carefully note the plastic ring situated above the rear camera's flash; it's prone to detachment and should be removed to prevent issues during disassembly.
Employ tweezers, a plastic pry tool, or a spudger to detach the surrounding plastic ring.

Step 15

Using appropriate tools, detach the cable cover from the logic board by unscrewing the four fasteners that hold it in place.
Use a Phillips screwdriver with a 2.7 mm tip.
Employ a Phillips screwdriver, size 2.6 mm.
Employ a Phillips screwdriver, size 1.3 millimeters.
Employ a Phillips screwdriver, size 1.2 millimeters.

Step 16

Carefully disengage the cable cover tabs from the slots they occupy within the electromagnetic interference (EMI) shield on the logic board, utilizing the side of a plastic opening tool.
Carefully detach the cable cover by gently prying upwards from the side closest to the uppermost edge, then separate it from the iPhone.

Step 17

Carefully lift the rear camera connector from its socket on the logic board using the edge of a plastic opening tool.
Exercise caution to avoid damaging adjacent parts while lifting.
Carefully detach the rear camera assembly from the iPhone.
Before reassembling, verify the small rubber gasket positioned beneath the rear camera is correctly aligned.

Step 18 | SIM Card

Employing either a SIM eject tool or a straightened paperclip, release the SIM card and its associated tray.
Expect considerable effort to be needed for this step.
Using the SIM tray removal tool, or a small, straightened paperclip, carefully eject the SIM card tray and then detach the SIM card.

Step 19 | Logic Board

Disconnect the five cables situated at the logic board's upper section, adhering to a specific sequence.

The cable connecting the headphone jack and volume button assembly.
The connector linking the front-facing camera to the device's internal circuitry.
The flexible ribbon cable connecting the display's touch sensor to the mainboard is the digitizer cable.
Connect the display data cable.
The power button cable is situated below the headphone jack/volume button cable, as illustrated in the second image.

Carefully leverage the edge of a plastic opening tool to raise the connectors of the cables, releasing them from the logic board's sockets.
Exercise caution during cable disconnection to prevent damage to the tiny, fragile surface mount components.

Step 20

Using a Phillips screwdriver, detach the grounding clip from the logic board by unscrewing the 1.5 mm screw located close to the headphone jack.

Step 21

Carefully lift the small grounding clip away from the logic board's surface using the pointed end of a spudger.
Detach the grounding clip from the iPhone by holding it firmly.
To prevent grounding problems, thoroughly clean all metal surfaces where the grounding clip makes contact—excluding the connector housings—using a solvent like Windex or isopropyl alcohol; this removes oils transferred from handling.

Step 22

Using the appropriate tool, detach the 4.8 mm standoff screw located close to the headphone jack.
Employ a standoff screwdriver or bit to extract standoff screws.
If a specialized tool isn't available, a small flathead screwdriver can be carefully substituted; however, exercise heightened awareness to prevent slippage and potential harm to nearby parts.

Step 23

Carefully separate the Wi-Fi antenna connector from the logic board using the tip of a plastic opening tool.

Step 24

Carefully remove the black tape that secures the screw located close to the power button, if it is present.
Using a Phillips screwdriver, detach the logic board by unscrewing the 2.6 mm screw located close to the power button.
Exercise care while loosening the screw, as it secures the power contact, which is prone to detachment during removal.
During disassembly, be aware that a tiny rubber bumper is located beneath the screen and digitizer cables, specifically near where they are disconnected above the Q-code; this component may detach from the logic board during removal or become adhered to the cables and subsequently separate.

Step 25

Using the appropriate screwdriver, detach the logic board from the enclosure by unscrewing all listed fasteners.
Locate a Phillips screw, sized at 2.5 millimeters, positioned close to the vibrator motor.
A Phillips screwdriver is needed to remove a single screw with a 2.4 mm head.
A 3.6 mm standoff is located on the logic board's edge, closest to where the battery is situated.
Employ a standoff driver bit, attached to a driver handle, to detach the 3.6 mm standoff screw.
If a specialized tool isn't available, a small flathead screwdriver can be carefully employed; however, exercise heightened vigilance to prevent slippage and potential harm to nearby parts.

Step 26

Gently raise the logic board, beginning at the speaker enclosure end, and move it horizontally, sliding it out from beneath the iPhone's top edge.
Carefully detach the logic board, ensuring all connections are released and no components are stressed, following the established procedures for component removal.
To prevent grounding problems, thoroughly remove any oils from the logic board’s metal surfaces where components directly touch—excluding the connector pins—using a cleaning agent like Windex or isopropyl alcohol prior to reassembling.
A tiny rubber bumper, positioned along the logic board's upper edge at the point where the digitizer and screen cables exit the case, safeguards those cables from damage caused by bending. This component may adhere to the cables or detach from the logic board during disassembly; refer to step 22 for additional information.

Step 27

The tiny grounding tab associated with the rear camera, located close to the power button, must be kept secure; it is affixed to the printed circuit board via a screw and secured with black adhesive tape.

Step 28 | Vibrator

Carefully insert the plastic opening tool into the gap separating the vibrator motor from the iPhone's side casing.
Using a prying tool, carefully lift the vibrator to detach it from the adhesive that holds it in place within the iPhone.
Detach the vibrator assembly.

Step 29 | Speaker Enclosure Assembly

Using a Phillips screwdriver, detach the speaker enclosure by unscrewing the two fasteners measuring 2.4 millimeters each, located on the sides.

Step 30

Carefully detach the plastic bracket secured beneath the screw nearest the dock connector cable.

Step 31

Carefully detach the speaker enclosure, a component containing the speaker and microphone, from the iPhone's internal structure.

Ensure the Wi-Fi grounding fingers are positioned beneath the lip of the iPhone’s metal case, referencing the second image for correct placement, prior to tightening the speaker enclosure assembly’s screws.

To prevent wireless interference, thoroughly clean all metal surfaces where the Wi-Fi antenna grounding fingers meet the iPhone case using a solvent like Windex or isopropyl alcohol prior to reassembling the device. Finger oils can negatively impact wireless performance.

Step 32 | Screen

Carefully peel away the sections of black tape securing the display to its mounting points.

Carefully separate the corner screws; they differ in thickness from the standard 1.5mm screws and should be stored apart.

Step 33

Using a Phillips screwdriver, detach the display assembly by unscrewing the 1.5 mm screw located close to the power button.

Step 34

Using a Phillips screwdriver, detach the 1.5 mm screw located close to the headphone jack.
Accessing the screw is simplified by detaching the headphone jack, a process especially helpful during reassembly; consult the iPhone 4S Headphone Jack Cable guide for detailed instructions on headphone jack removal if needed.

Step 35

Using a Phillips screwdriver, detach the 1.5 mm screw located close to the lower microphone.

Step 36

Using a Phillips screwdriver, detach the 1.5 mm screw located close to the dock connector cable.

Step 37

Using a Phillips screwdriver, slightly reduce the tightness of each of the three large-head screws positioned along the iPhone's volume button side, rotating them approximately 180 degrees.
These screws do not require full removal; during reassembly of the display, position the washers adjacent to the screw heads, referencing the visual guide provided.

Step 38

Using a Phillips screwdriver, slightly reduce the tightness of each of the three substantial screws located on the opposite side of the iPhone, rotating them approximately 180 degrees.

Step 39

Carefully lift the display assembly's edges from the device body using a plastic opening tool, applying gentle force all the way around.

Step 40

Carefully detach the display component from the iPhone device.

Step 41 | Display Assembly Installation

Before beginning the display assembly replacement, observe these critical points to ensure proper installation.
Transfer the existing home button to the new display assembly, as it is typically not included; handle the thin rubber gasket with caution to prevent damage. Verify the speaker mesh is present on the replacement display; if absent, relocate it from the original display.
Prior to installation, remove the adhesive backing, typically identified by its blue or pink color, from the replacement panel.
Ensure the 7 mm clear plastic ring that protects the front-facing camera is moved from the original display to the replacement display if it is not already attached.

Step 42 | Display Assembly Installation (Cont'd)

Pay close attention to the subsequent steps regardless of whether you are fitting a new display assembly or keeping the original.
Gently manipulate the LCD and digitizer data cables to remove any kinks, then route them through the opening created in the device's exterior housing.
Ensure the digitizer cable is routed completely through its designated channel, as demonstrated in the central image.
The digitizer cable's excess length is causing a problematic bend or loop, as illustrated in the images, where it becomes trapped within the slot; this improper installation of the display assembly is depicted.
An improperly installed digitizer cable will fail to seat correctly within its connector on the logic board. Avoid forceful manipulation, as the enclosure's sharp-edged slot can sever the cable. Instead, disassemble the display assembly, ensure the cable is straight, and carefully guide it back through its channel to achieve proper and full seating.

Step 43 | Display Assembly Installation (Cont'd)

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 before proceeding.
To prevent display issues potentially caused by static electricity, use an alcohol wipe to thoroughly clean the touchscreen before powering on the iPhone following reassembly.
To ensure proper initialization following reassembly, apply AC power to the iPhone before powering it on; after successful boot-up, the AC power connection can be removed.
To prevent surface damage, apply a fresh screen protector to the display following reassembly.

Step 44 | Home Button Assembly

Carefully separate the bottom right corner of the home button assembly from the display assembly by gently lifting with a plastic opening tool.

Step 45

Carefully detach the home button assembly from the display assembly's adhesive using tweezers.
Carefully detach the home button assembly from the display assembly.

Step 46

Detach the component.Carefully separate the home button from its gasket.

Step 47 | Home Button Gasket

The gasket originally situated around the home button must not be discarded.