SOLVED: When your iPhone 6 Plus No Display After Booting

Get an iPhone6 Plus, the customer describes three faults: 

Trouble Phenomenon:

1. touch is unresponsive, disassemble and re-plug flex cable made the iPhone6 Plus no display, but he can receive the call, we judge that the screw of the iPhone flex cable iron got wrong; 2. Frequent no service; 
3. big noise when talking on phone. The description are listed in picture 9-3-1.


Repair Process:

Step 1, disassemble the iPhone and connect with adjustable power supply to trigger the current is normal, then we are going to measure the value of display pin but find no abnormalities.

Step 2, observe the iPhone 6 Plus motherboard and find that it has been removed two screws before, so the third screws were also removed by us, each screw column has twisted traces, then we get all of the three iPhone screws scraped, we find no signs of disconnection.

Step 3, test the iPhone display, the normal power supply value is shown as 1.8V, both +5.7V and - 5.7V have no voltage output. +-5.7 are output by the iPhone display power IC, first remove the display IC and hit each pin to the ground value, we find D3 foot 12C0 bus disconnection. 

Step 4, by observation on  the iPhone bitmap, we find the D3 pin is connected with the pull resistor on the side of R0302, so directly welding jumper wire from the resistance flying line to the display power D3 pin, and the resistance is measured as normal. 

Step 5, install the display power, connect the screen to have a power test, the iPhone can display in a normal way. But touch can not be used, so we reinstall the black touch. As shown in picture 9-3-2 and 9-3-3.





Touch function is fixed successfully, because there is no password, as shown in picture 9-3-4, other functions can not be tested, so our phone maintenance is end here.


Tips: More information and iphone repair skills, you can view and free consulting VIP Pro Shop Team. Or leave a message.

Comments

Post a Comment

Popular posts from this blog

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 mic...
Read more

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....
Read more

How To Solve iPhone X Voltage Jumping Issue

Image
Today, We getting the iPhone X main board to test, we observe the current value repeatedly jumps between 0mA and 50mA on DC power supply , and it is different from the normal booting current. Next, test whether the power supply of every circuit is normal. PP_VDD_MAIN is measured 4.2V; PP_VDD_BOOST measured is 4.2V. PP1V8-ALWAYS is 1.8V, all the values are normal. But when testing PP1V1_S2, PP0V8_SOC_FIXED_S1, PP1V8_S2 and other circuit voltage that output by power chip U2700 voltage are jumping constantly. According to previous experience, voltage jump is usually caused by a power supply circuit of U2700 output. Measured with digital multimeter , there is no short circuit was found for the dipole value of all power supply to ground. We repaired iPhone 7P before and know that if crystal oscillator is false welding can also cause voltage jumping, And if iPhone CPU power supply is abnormal also can cause voltage jumping. Check the crystal oscillator we find no problem, then check th...
Read more