Solve the Problem of iPhone Automatically Restarting Due to Hard Drive Cold Welding

iPhone Hard Disk cold soldering refers to the phenomenon that the soldering points between the hard disk and the motherboard are loose or in poor contact, which may cause problems such as the hard disk not working properly, data transmission errors or loss. For problems such as iPhone automatic restart caused by hard disk cold soldering, how to repair it should be done. The following is the repair experience from Phonefix.

Diagnose the problem:

Symptom identification: Look for signs such as abnormal sounds from the hard disk (such as clicking), sudden system freezing, or the computer not starting properly.

Solder point inspection: Use an Industrial Microscope to carefully inspect the solder points on the hard disk PCB. Look for cracks or discoloration that may indicate the presence of cold solder points. Poor soldering quality often leads to failures due to thermal cycling or mechanical stress.

Connection check: Make sure all connections between the hard disk and the motherboard are secure. Loose cables will aggravate symptoms and cause confusion during diagnosis.

Prepare tools:

Electric soldering iron: Select an electric soldering iron with appropriate power according to your needs. Generally, 30W-60W is more commonly used.

Solder wire: Select solder wire with appropriate diameter and good quality, and the flux content should be moderate.

Solder Flux: Liquid flux or solder paste can be used to help remove oxides and improve welding quality.

Tweezers: used to clamp components and assist in welding operations.

Desoldering machine: used when disassembly or cleaning of excess solder is required.

Anti-static wristband: prevent static electricity from damaging electronic components such as hard disks.

Operation steps:

1. Confirm the location of the cold soldering

First, open the computer host, remove the hard disk from the host, and carefully observe the solder joints at the hard disk interface. Generally speaking, the cold solder joints will have obvious cracks, looseness or uneven soldering. You can also use the resistance range of the Digital Multimeter to measure the resistance between the hard disk interface pin and the circuit board. If the resistance value is unstable or significantly larger, it is likely that the solder joint has a cold soldering problem.

2. Clean the welding parts

Use alcohol and cotton swabs to carefully clean the hard disk interface and the welding parts on the circuit board, remove impurities such as dust, oil and oxides on the surface, and ensure that the welding surface is clean and tidy for better welding.

3. Welding operation

Put on an anti-static wristband and preheat the Soldering Iron. Place the soldering iron tip on the part to be welded, and at the same time, contact the solder wire with the soldering iron tip and the welding point, so that the solder melts evenly and covers the solder point, making the solder point full and smooth. When welding, control the welding time and temperature to avoid overheating and damaging the hard disk or causing other solder joints to loosen. The welding time of each solder joint is generally controlled at about 2-3 seconds.

4. Check the welding quality

After welding, turn off the power of the soldering iron, and gently move the welding part with tweezers to check whether the solder joint is firm and whether there is any false soldering or false soldering. At the same time, observe the appearance of the solder joint, which should be bright and full, without burrs, short circuits and other problems.

5. Installation test

Reinstall the welded hard disk into the iPhone, connect the power cord and Apple Data Cable, and turn on the phone for testing. Observe whether the iPhone will automatically restart again. At the same time, you can use the hard disk detection tool to check whether the working status of the hard disk is normal, such as whether it can recognize, read and write data normally.

If your phone or computer restarts automatically, you may consider that it is caused by a poor solder joint on the hard disk. Refer to the steps in this guide for repairs. The above repair tools can be obtained in CHINA Phonefix Stores. If you want to learn more repair skills, you can follow Phonefix. Phonefix will share repair cases with you from time to time.