SOLVED: iPhone 6 No service After Booting Issue

A customer sent us a wrong iphone 6, and he said his phone was out of order with Repeats Booting, iPhone 6 signal keeps searching state after booting, there is no baseband in local setting,and no series number shows up when dialing *#06# serial number. He asked us urgently how to help him solve this problem quickly, So today today, The VIP Pro Shop Team will show you a good way to fix them.  


We find the iPhone 6 LCD has been replaced once, this kind of situation is preliminary determined for baseband CPU false welding, it is relatively common situation on iPhone 6 and iPhone 6P. Anyway we need to test first!

From the simple start, measuring the single iPhone 6 motherboard baseband power supply, first measure the main power supply 4.2V,14-7-1



Then testing baseband output voltage of power supply on C3262, C3252, C3259, C3256, if there is a voltage without first measuring resistance, if resistance is normal, then replace normal baseband power test; if four of them are simultaneously without resistance, then you need to reinstall the baseband CPU. There is a small glass tube base strip above the baseband power supply, it must be noticed when the main board is disassembled, if it gets damaged, the iPhone 6 will not be repaired.

Before the iPhone 6 CPU is removed, we must deal with the shielding cover carefully. We need to cut it off with professional cell phone repair scissors. This is relatively safe. The shielding factory is very strong in welding, and the risk of heating and blowing is relatively large.

The baseband CPU can be mounted on the fan to avoid heating IC.  It doesn't matter if you see some empty solder points. It takes two parts to solder jumper wire on the pad: U1 and V1 pin. 14-7-2



It may be okay to see two points on the naked eye, but under a Trinocular Stereo Microscope , it will be found that the two points are at the top of the layer, and the line is very thin. Sometimes there will be baseband faults when the line is disconnected. For the sake of insurance, solder jumper wire first. 14-7-3


The small U is thicker. When do CPU reballing, you can cut out a small square on the paper towel and put the small U in it. After installing the baseband CPU, you can first test the C3402_RF to determine whether whether the baseband CPU is installed ok.

Now both baseband and signal of the iPhone 6 device are tested normal.

Tips: If you need more information and professional repair skilled, you want to consult, please check here. We'll give you a free answer. 

Comments

Post a Comment

Popular posts from this blog

2021 Latest MagicAWRT Adapter Restore Tool for Apple Watch

Image
 Here we have the latest MagicAWRT adapter Apple Watch restore tool in 2021, and MagicAWRT offers its complete solutions to fix many apple watch problems. MagicAWRT Adapter is intended for solving service problems with Apple Watch S0/SE/S1/S2/S3/S4/S5/S6 (38 mm / 42 mm / 40 mm / 44 mm). It can solve problems such as white apples, exclamation points, restarts, stuck on screens, poor touch, ID lock, etc. It also can fix related issues that are caused by  Apple Watch glass digitizer touch replacement. Apple Watch Firmware for MagicAWRT Adapter Restore Tool will not be provided, and the customer needs to download themselves. 1. Using MagicAWRT Adapter to reset Apple Watch Data with or without Backup MagicAWRT Recovery Adapter Restore Tool is the best iOS data restore software in the market because of its ease of use and attractive user interface. Most Apple Watch users data losses are due to accidents, failed jailbreaks, hardware and software failures, factory resets, and theft. It would
Read more

My iPhone Got Wet! How To Fix iPhone Water Damage?

Image
 Water damage tends to worsen with time, and it is among the more challenging DIY repairs to undertake, so this guide covers the basic iPhone repair of water damage.  1. Remove iPhone from the water and Turn it off Remove your iPhone from the water as soon as safely possible. Minimize the length of time the iPhone and water are in contact to minimize corrosion. If your phone is still on when removed from the water, attempt to turn it off. If it's off, do not attempt to turn it on. 2. Check External Ports Check any external ports (charging port, headphone jack, SIM card slot, etc.) for corrosion as well. These may have to be cleaned out with alcohol and a  Anti Static Brush , or replaced if cleaning is not practical. Pay special attention to cable ends, battery contacts, connectors, pins, and fuses, as these parts are prone to corrosion and can easily cause the phone to malfunction. Test all the buttons and features (such as the microphone, s
Read more

Free download: Ford / Mazda odometer correction tool software

Image
New Mazda OBD2 Tool is the Digital Odometers, Airbag reset and immobilizer programming cables by OBD2, it is a newly OBD2 device for Mazda Vehicle. Mazda OBD2 Tool is Mazda OBD2 Odometer correct and Airbag module repair tool, especially for Mazda vehicle from 2005-2015.It is OBD2 user friendly tool, used for calibrate odometer and airbag repair. For Mazda Digital Odometers programming and Airbag reseting Tool by OBD2 Mazda OBD Tool is used to calibrate the instrument for all CAN-bus Mazda cars from 2005 to 2015 including MADZA 3/ MADZA 6 / MADZA CX5 / MADZA CX7, as well as reset the airbag/SRS for Mazda with XC236X chip. 2017 New Ford / Mazda OBD2 Tool is the Car Digital Odometers and immobilizer programming cables, and Ford OBD2 Tool and Mazda OBD2 Tool is used to mainly perform Ford / Mazda Digital Odometers, instrument calibration and immobilizer key matching. Here, VIP Pro Shop Team will share the software download link for Ford OBD2 Tool and Mazda OBD2 Tool.
Read more