Your Guide to Local iPhone Repair Services

For Apple users, iTunes error code are not strange, it is common to see that iTunes error 4014 or iTunes error 4013. Today, we will share a case about iPhone 6 Plus reports iTunes error 4014 after iPhone Nand Flash upgrading. When we flash the iPhone device, it displays error 4014 before progress bar showing up. It is restored and the serial number could be recognized, which appeares after Nand expansion. This is usually caused by the iPhoneUSB chips  leading to CPU problem. We get to know it UMT motherboard after disassembly, then remove USB chip U1700 to measure resistance from solder pad to CPU, we find that AP_TO_TRISTAR_ACC_UART6_TXD shows the infinite value. And AP_BI_12C0_SDA is also broken, as shown in picture 1. The layer wire is disconnected, so we need to find out other connection point or digging for other holes, AP_TO_TRISTAR_ACC_UART6_TXD is direct connected without other external components, when digging the circuit AP_TO_TRISTAR_ACC_UART6_TXD we ...

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 ...

Today, we are going to talk about the iPhone 6 Plus shows black screen after booting.  Its current jumps normally, and it can be brush smoothly. However, when you press the power button, the iPhone screen shows nothing,  it just no display.  Disassemble the iPhone, take out of motherboard,  measure the diode data of display connector and  display condition, all is normal. Then we install the iPhone CPU and test it, the fault is still existing.    Check the   iPhone circuit diagram   to measure the MIPI module conditions (required power supply, pull-up resistor, pull-down resistor, etc.). As shown in picture  1 . When measuring PP1V0, there is no voltage, the resistance value to ground is 0, we doubt CPU is not installed properly, but it's the same fault after reinstalling. Remove CPU to measure motherboard without short circuit,  CPU ground value is also not short circuit. Reinstall again, it's still short c...

The front camera of iPhone 6 Plus is unavailable after dropping, but all other functions are normal, and you can switch freely between front camera and rear camera. The problem is when you use iPhone front camera to take pictures, it shows black screen.  This problem is generally caused by data  hub. In this case,  it is likely to be caused by the disconnection or   iPhone CPU  false welding. Step 1 Disassemble and install a new camera, same fault phenomenon remains the same, the problem is determined on the iPhone 6 Plus motherboard . Step 2 Power off the phone and measure the ground value of the camera interface, there is no any problems has been found, also the voltage needed for the camera is measured normally. This is a rare situation. If the CPU is false welding, the resistance shouldn't be normal, so there is almost impossible for getting a bad CPU. Step 3 Test the interface resistance again, infinity is detected when the...

Yesterday, we received an iPhone 6S, which problem is the iPhone home button   often gets unresponsive, and it will automatically change to  recovery mode.  Now, we need to fix it. Disassemble the iPhone, and take out the motherboard, we found that    the CPU and WiFi has been repaired,   32.768, 24M, iPhone NAND flash were also replaced.  Measure the iPhone motherboard with multimeter , power-on current is normal, then install the assembly to test, all of functions are normal, so we put aside to charge. An hour later, we find that home button has no response by pressing several times. The iPhone device could be lighted by pressing the screen-lock button, but home buttion is responsive after screen is locked, so the fault was judged as wake-up delay. Measure BURRON_MENU_KEY_CONN_L, the home button voltage is about 1.3V as normal valure, considering the peer has changed the iPhone WiFi , clock, CPU, so the fault is locked in the f...

We received a damaged iPhone 6 on last weekend, the problem is it cannot boot.  Vip Pro Shop Team has solved this problem. Connect iPhone 6 to DC power supply , it shows  large short circuit when connecting  Disassemble the device can check it under the microscope , we find that the flash position is hot, so we tear it down and find the solder pad is burned a hole. As shown in picture 9-6-1 . PP_VCC_MAIN is short circuit, but it turns normally after removing L1605 inductance, however, the other end of L1605 to U1602 flash chip is still short circuit, so we directly dig from the burning hole till it's not short. There are 2 useful wire below the hole after we dig it: one is from U1602 flash chip E3 pin RCAM_TO_LEDDRV_STROBE_EN  to rear camera  30 pin; the other is from CPU to transposon interrupt signal ALS_TO_AP_INT_L  of J1111. Solder the 2 wire with jumper wires , and apply the green oil  to solidify it. As shown in pictu...

Last weekend, we got an iPhone 6 Plus to repair,  its problems are as follows:  1.   Touch function 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. B ig noise when talking on phone.   Now, Vip Pro Shop Team will show you how to fix it First,  disassemble the iPhone and connect with DC power supply to trigger the current is normal, then we are going to measure the value of display pin but find no abnormalities. Observe the iPhone 6Plus 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. Test the iPhone display, the normal power supply value is shown ...

The iPhone 6 accidentally dropped into water, and then a series of issues came up. It has no response when press iPhone power button ,  and it shows big current, which means it is short circuit.  The direct big current current is 5A and the voltage is pulled down, the systom is usually caused by serious short-circuit of the  iPhone battery   direct power supply components or PP_VCC_MAIN power supply components.  Now, we need to fix it! The main chip (yellow) connected to the positive electrode of the battery is shown in picture 9-2-1 . 1:  Pick the hottest chip to remove, After the Q1403 is removed, the power supply is still large and short-circuit, which proves that the problem lies in the direct power supply element of the battery. Just clip a PP_VCC_MAIN to 4V and press the power button to enter the system, but there is no touch function. 2:  The capacitances around U1601 、 U1400 、 U_2GPA_RF are all measured as short circuit...

The iPad Air 2 can turn on, but when we touch the display screen, it has no response.  Now, Vip Pro Shop Team provides a solution for you. 1. Measure the iPad touch power supply, however, we can't find PPVDD_STINGER_BOOST voltage. PPVDD_STINGER_BOOST bitmap position of iPad as shown in picture 8-8-1 . PPVDD_STINGER_BOOST iPad circuit diagram    as shown in picture 8-8-2 . 2. Diode value of L4001 inductor cannot be found when measuring with multimeter . As shown in picture 8-8-3 . 3. So we have to replace a new L4001 replacement parts. In order to ensure the stability of the iPad, after replacing the L4001, by the way, D4001, C4014 and C4017 are replaced together. As shown in picture 8-8-4 . 4. Connect and reboot the iPad Air 2 to measure the value again, we find PPVDD_STINGER_BOOST shows 20V voltage now. As shown in picture 8-8-5 . Finally,  assemble iPad and test it, the touch function now back to normal, you can...

We got a iPhone 6S Plus to repair,  the iPhone audio has some problem. But now we can't make sure what caused this, we need to check it first. Connect iPhone  to DC power supply and test the  original iPhone audio IC , the current is normal. And when we replace the new audio IC to test,  it shows large current. So now we can judged that the original audio IC is good. Connect the iPhone device to check, it is not available for recording but the ringtone is normal. After disassembly, we find that large audio was not replaced before, first we are going to clean the iPhone motherboard . The electric current is normal when booting, the resistance measurement of U3500 M7 pin is on the ground. the point is the main power supply  of PP_VCC_MAIN, if it is grounded, it will certainly clamp large current, so once again when we pinch, large current is not there. As shown in picture 8-6-1 . Remove the shielding cap to measure the capacitors C3603 and C36...

Last week, we got a iPhone 6S Plus from customer,  the problem is the half of iPhone screen is black, but the other half has a normal brightness, when the screen light blacked out, it cannot get light on again.  Vip Pro Shop Team can fix it. 1. Disassemble the iPhone 6S Plus device, we found all the D4050 、 D4051 、 U4050 of the iPhone backlight IC  were removed, D4051 pad tin point dropped, it has been welded with jumper wires , but it was not fixed in a proper way. As shown in picture 1. 2. Clean the part of pad on iPhone 6s Plus motherboard , solder the jumper wire on it, and also weld the iPhone backlight diode  and backlight chip.  3. Connect and test the iPhone screen, we found that half black screen problem still exist. As shown in picture 2. 4. It looks like there's another problem, disassemble the iPhone 6s Plus motherboard. 5. Observe under the microscope , we found L4050 inductance surface cracks,  according to e...