跳至主要内容

iPhone 7 Plus Won't Turn On After Water Damage

Water damage is unavoidable for most of cell phone owners, sometimes even if you are really careful, but the accident often happens, maybe you drop your cell phone into toilet, tank, cup, etc. It's very possible to happen like that. However, how to do if your iPhone 7 Plus drop into water and it's unable to turn on? In this article, you will get answer:

Disassemble the iPhone to check circuit board; there are no obvious traces of water. And then remove all sockets, no traces of corrosion were found on the socket and the socket interface.

Connect the iPhone 7P circuit board to DC power supply, supply power to it, it shows large current and won't boot.

Check the iPhone 7P circuit board and observe under the 7-45X Trinocular Stereo Microscope, we found that both the capacitor and the main supply capacitor on the bottom of the iPhone motherboard to backlight are corroded. According to our experience, for iPhone 7 or iPhone 7 Plus, we can first check the first row of capacitors on this circuit line, because we've repaired the several won't boot iPhone because of the large current caused by the capacitance.

Use PPD 861D Plus hot air rework station to remove C3530, the main power supply not short circuit now, and when we supply power to it, the iPhone can be turned on normally. However, there is no display after iPhone touch screen installation. After check it, we found that D3701 and D3702 have been corroded and blackened, directly replace it.

Re-install the iPhone and test it again, after insert the SIM card, the iPhone is always in the search signal, dialing *#06#, the IMEI can display normally, so we can eliminate the baseband problem.
Tear down iPhone again to check, we found a chip next to the amplifier was missing. After check iPhone schematic diagram on WUXINJI Dongle, it is FL7001_RF. Directly weld a jump wire on it, and then install iPhone to test, now the signal is normal.


More detailed cell phone repair tutorials, please read on our website: www.vipfixphone.com

评论

此博客中的热门博文

iPhone 6 Display Failure after Replacing LCD

The iPhone 6 display is black after replacing LCD. After checking, the diode data of display socket is normal and all power supply for iPhone display IC  output is normal. Testing by  DC power supply , we find the iPhone current is abnormal. When press the iPhone power button, the boot current is obviously large. The current reached 100mA when press the power button. After remove the display tube, the current still the same, which means there is a short circuit. Measure the voltage output of each circuit of power supply with Fluke 15B+ Digital Multimeter , then surprised to find that there are really short circuit places. LD010 is short circuit; we suspect that the filter capacitance on the circuit has been penetrated. After remove the iPhone power control IC , we found it is ground short circuit. Open the WUXINJI Dongle  to check the iPhone schematic circuit, we found that this circuit is the display card image transmission MIPI data bus power supply. CPU brea...

Solution: iPhone X Won't Turn On

According to the customer's description, the iPhone X would not turn on after it drop accidentally. Then the cell phone reports error 56 when restore it. How did this happen? Let's test and repair step by step. Since iPhone X motherboard 2 layers are connected through the middle column, the solder points are very easy to get dropped. so we guess that the solder points from NFC chip to the CPU part have fell off. Disassemble the iPhone X by iPhone opening tools , remove the upper board off the main board, when separate the main board we see there is a row of points have fell off. Check the location map on WUXINJI dongle , it is surrounded by a ground wire, in fact, there are 6 useful points dropped. The ground wire does not need to be filled, the 6 useful points are added by professional phone welding tools. These are the signal wires of the NFC chip, so the iPhone X would report error 56. Then the tin of the middle column is repaired by iPhone X BGA reballing ste...

Guide: iPhone 7 Plus Camera Fault Repair

iPhone camera failure is common for most of cell phone repair technicians, today, we're going to fix iPhone 7 Plus camera. According to the holder's description, the front small camera is normal while the rear camera fails to take photos, when turn on it, the iPhone 7 shows black screen. Let's start from easy repair operation: directly replace the iPhone camera to have a test.  Note: Pay attention that two camera are connected together. When disassemble the iPhone 7P rear camera , you need to pry up from the left side.  The fault is same as before after replacing a new rear camera. We tested before, the iPhone 7P double camera is rely on the bigger camera to get image, as shown in 15-5-1, the corresponding part on iPhone 7P motherboard is J4501 pin, the resistance value is normal after testing with Fluke 15B+ digital multimeter , it reminds of us that iPhone6 Plus also encountered this phenomenon, the power supply part has some problem. By checking on  WUXINJ...