Samsung Galaxy A21s LCD Display Replacement

• Use a SIM eject tool to remove the SIM card tray.

When reinserting the SIM card tray, make sure it is oriented correctly.

Heating the bottom edge of the smartphone helps soften the adhesive securing the display and makes it easier to open.

• Use a hair dryer or heat gun to heat the bottom edge of the smartphone for approximately 3 minutes, until it reaches a temperature of about 80°C.
• Do not put the smartphone in a microwave!!!

• Place a suction cup on the back cover and gently pull to separate the back cover from the smartphone frame.
• Then insert a FixServis opening card between the frame and the back cover to create a small gap. Slowly slide the card around the edge to loosen the adhesive and separate the back cover.
• If necessary, use a cleaning solution (Cleanser – 100% Isopropyl Alcohol).

If you have difficulty separating the back cover, heat the smartphone again to further soften the adhesive. Be careful not to overheat the device.

• Remove the back cover.

• Remove the sixteen 3 mm Phillips screws securing the midframe.

Throughout the repair, keep track of each screw and make sure it is reinstalled in its original position to avoid damaging your smartphone.

• Insert a FixServis opening card between the midframe assembly and the front panel, then slowly slide it around the smartphone to separate the midframe.
• Then remove the midframe.

• Use the flat end of a spudger to disconnect the battery connector.

• Use the flat end of a spudger to pry up and disconnect the interconnect cable from the motherboard at both the top and bottom ends.
• Then remove the cable using tweezers.

• The cellular antenna cable is connected to the motherboard.
• Use a spudger to disconnect the antenna cable from the motherboard at both the top and bottom ends, then remove it using tweezers.

• Use a large spudger or a FixServis opening card to remove the battery from the device.
• If you are unable to remove the battery, use a hair dryer or heat gun to heat the display for 1–2 minutes to soften the adhesive underneath the battery.

Be careful not to overheat the smartphone.

• Use a screwdriver to remove the Phillips screw.
• Then use a spudger or tweezers to remove the motherboard.

• Use a hair dryer or heat gun to heat the USB board for approximately 1–2 minutes to soften the adhesive underneath it.

Be careful not to overheat the smartphone.

• Use a spudger to remove the USB board from the smartphone assembly.

• Remove the old adhesive from around the edges of the midframe.
• If necessary, use Cleanser IPA Plus cleaning spray to remove any remaining adhesive residue.

• Install all components onto the new LCD display by following the previous steps in reverse order.

To reassemble the device, follow this guide in reverse order.

• Remove the old adhesive from around the edges of the smartphone.
• If necessary, use Cleanser IPA Plus cleaning spray to remove any remaining adhesive residue.

• Apply new adhesive around the inner edges of the back cover.
• Then attach the back cover to the smartphone.

The new adhesive helps restore the smartphone's resistance to water and dust.

• Use a spudger to connect the fingerprint sensor flex cable to the smartphone assembly before installing the back cover.
• Install the back cover onto the smartphone assembly.

• Attach the clamps as shown in the image to ensure better adhesion between the back cover and the smartphone frame.