Repairing a malfunctioning device can be challenging but rewarding, especially when it involves a complex gadget like the Samsung Galaxy Z Flip 4. One common issue with foldable phones is unexpected shutdowns when folding the device. In this article, we will walk you through the repair process of the Samsung Galaxy Z Flip 4, which is experiencing a unique issue where the phone turns off whenever it is folded or folding. This guide will detail step-by-step instructions on identifying and fixing the problem, focusing on possible damage to the hinge cable.
Diagnosis and Initial Steps
The first step in addressing this issue is to determine if the hinge cable indeed causes the problem. We begin by removing the back cover to inspect the internal components. To do this, heat the device at 90°C for about one minute to soften the adhesive. Carefully slide a plastic card into the gap and apply some alcohol to help release the adhesive, then gently remove the back cover.
Repeat this process for the front cover, disconnecting the necessary cables before removal. After securing the lens with protective stickers, unscrew and disconnect the two battery cables and remove the wireless charger and bottom speaker components.
Replacing the Hinge Cable
Next, we will take a REWA hinge cable and connect it, followed by testing the device by slowly folding it. If the phone no longer turns off, the issue is confirmed to be the faulty hinge cable.
However, to fully replace the cable, the screen needs to be removed since part of the cable is located underneath it. Use tweezers to detach the clips on both sides of the frame and apply alcohol to help remove the plastic support without breaking it. Once the screen is free, clean up the surrounding area.
Inspection and Final Assembly
Carefully peel off the insulation tape to reveal the hinge and check the cable for damage under a microscope. Once confirmed, replace the faulty hinge cable, taking care to securely install it.
After that, reassemble the screen with adhesive and place it back onto the device, ensuring all clips are properly engaged. Don’t forget to reattach the hinge cable and the waterproof adhesive.
Finally, reattach the bottom components, the wireless charger, and the rear cover. Apply pressure for about 15 minutes to secure everything in place. Once complete, power on the device and test the folding mechanism to verify that the issue has been resolved.
With careful attention to detail and methodical steps, the Samsung Galaxy Z Flip 4 can be successfully repaired. For replacement parts and further assistance, contact REWA Tech or visit REWA Shop.
