Skip to main content

5 Steps to repair iPhone 6S won’t turn on problem

We received an iPhone 6S, which won't turn on after normal use, no dropping, no water damaged,  the iPhone appearance is good.  After checking, vip pro shop team used 5 steps has fix this problem. Let's look at it.


1. Open the iPhone screen by phone opening tools,  there is no  traces of water corrosion.  Measure the resistance of battery, the data is normal.  Use multimeter to test the it, the voltage it directly up to 1.8A, which belongs to the large current

2. Tear down all the accessories and starting with a single iPhone 6S motherboard, the result is the same, so you can be sure that the accessories or parts are ok. Before we fixed a lot of large current cell phone devices, power on and directly measure value, making sound is basically the components on VCC main power supply get problem, but the situation of current up to 1.8A is still relatively rare. 

3. After determining the measurement, we can confirm the problem is from VCC circuit, for big current device, you can use rosin with soldering station, apply rosin on the solder iron and work on VCC main circuit components, it will produce white smoke, power on again, you can see Q2300 charging switch tube quickly shine. The part is shown in picture 10-1-1.


This will make people think that the booting problem is caused by this parts, according to our experience, it's not caused here.

Two circuit power supply is shown in picture 10-1-2.


Because this component focuses on B+ and VCC power supply, so it's heating firstly, but it can be determined that it's not bad, for 6S 1.8V device, you can directly focus the problem on backlight part.  The backlight part is easy to burn out.

4. Open the iPhone CPU shield (setting spiral hot air gun 260 degrees can easily take off, avoid high temperature, so as to avoid CPU solder explosion), we find  the traces of components are burn out on the two backlight diode and C4023, it is best to pack first before processing elements near the CPU. As shown in picture 10-1-3.


5. Disassemble two diode and a capacitor and power on again is normal, deal with the solder pad with low temperature solder. you should be gentle when handling it since the pad is easy to fall off. Replacing the new components, reboot and test, every function is normal now.  As shown in picture 10-1-4.


Tips:


1.  This iPhone 6S problem is solved after replacing two diodes and capacitor C4023. Some of the backlight IC and backlight inductance get yellow, which will be required to be replaced. 6S backlight parts are easy to be broken, and the components are all covered with glue. When you remove it, don't be impatient. It will be convenient for the following work after the glue is removed.

2.  If the diode is installed in the reverse will appear large current phenomenon, after the replacement, you can test again by solder iron with rosin so that will be more intuitive to see whether it is installed, C4023 capacitor must be installed, otherwise it is easy to burn the iPhone backlight IC.



Comments

Post a Comment

Popular posts from this blog

User Manual: JC V1 Programmer to fix iPhone light sensor/vibrator

As we know, the light sensor and vibrator is very important for iPhone screen. If you want to replace the iPhone screen, you also need to transfer the original screen data to the new iPhone screen(iPhone 8 to iPhone Xs Max),so you can make sure the new iPhone screen will work fine. Here is a  JC V1 programmer  to fix iPhone light sensor and vibrator problem (for iPhone 7- iPhone Xs Max), it also can repair iPhone baseband eeprom IC or iPhone logic eeprom IC problem. The JC V1 Programmer comes with 24-inch HD display screen, three-color LED indicator light, two small connecting seats (for connecting function panel) , two buttons and one function panel (including light sensor/touch connector, baseband function connector, vibration connector) It support 2 languages (Chinese/English) and three lines of code (read/write/burn/save), the function panel can be changed, the software can automatically update What’s the functions? - Repair iPhone Light sensor/ true ...
1 comment
Read more

Essential tools for a phone repair technician Everyday Use

Must-Have tools for a phone repair technician include precision screwdrivers, spudgers, tweezers, suction cups, and heat guns or hair dryers. Additionally, anti-static mats and wrist straps are crucial for protecting sensitive electronics. Other helpful tools include a multimeter, soldering iron, magnifying lamp or microscope, and various cleaning supplies.  Whether you're a DIY enthusiast or a professional technician, having the right tools is crucial for successful phone repair. Here's a breakdown of common phone repair tools, categorized for clarity: I. Essential Opening and Disassembly Tools: Precision Screwdrivers : These are the most fundamental tools. Phones use tiny screws of various types (Phillips, Pentalobe, Torx, Flathead), so a comprehensive set with magnetic tips is highly recommended to avoid stripping screws and losing tiny parts. Spudgers ( Pry Tools ): Made of plastic or nylon, these non-conductive tools are invaluable for safely prying open phone casings...
Post a Comment
Read more

How to restore & unlock the apple watch series 1, 2, 3, 4, 5, and 6?

  Can you always remember your password? What should you do when there is a red exclamation error on your Apple watch after update you iWatch？6 IN 1   AWRT iBus   Tools, a professional Apple Watch recovery tool, enables you to unlock, repair and remove the exclamation error easily.   Why choose the AWRT iBus tool? Perhaps you would tell me Apple support team can solve the trouble. While they may help, you may not be patient enough because you want your watch fixed immediately. Moreover, you don't have to wait for too long for them to help you solve the issues. 1. This incredible device has an inbuilt original restore adapter for the apple watch of the series S1, S2, S3, S4, S5, and S6 42 mm and 38 mm /$199. There are also S1-just 38MM /$39.99, Adapter for S1-42mm 38mm /$139.99, or Adapter for S2 S3 - 42mm 38mm /$169.99 version for choosing. The tool requires professional Apple Watch Firmware  IPSW File  for iWatch S1-S6. 2. Moreover, the iBus tool has a lot...
Post a Comment
Read more