iPhone 8 Plus Turn on With Black Screen Repair

Malfunction Phenomenon There is no response on the screen when is turned on the phone. Trouble Shooting For the iPhone 8 Plus Turn on With Black Screen Repair issue. Take apart the phone and connected with DC power supplies, press the power button to power it on, the reading on the ammeter is normal. So […]

iPhone 7 Plus 3D Touch Not Working

Malfunction Phenomenon The phone can be turned on and the touchscreen can work, but the 3D touch does not work at all. Trouble Shooting For the iPhone 7 Plus 3D Touch Not Working issue. Disassemble the phone and check the motherboard, especially the area around the 3D touch connector J3801. We found the capacitor C3828 and the […]

iPhone 7 Plus Can Not Detect SIM Card

Malfunction Phenomenon iPhone 7 Plus can not detect SIM card. And the Baseband information was normal with IMEI when we press *#06#. Trouble Shooting According to the malfunction phenomenon, we can try to check the SIM card reader firstly.  Use the multimeter to check the diode values on the SIM card reader J_SIM_RF, we found […]

iPhone 7 Plus Touch Screen Not Working

Malfunction Phenomenon The phone can be turned on normally, but the touch function not working. Trouble Shooting For the iPhone 7 Plus Touch Screen Not Working issue. Because there is no touch ICs on the motherboard anymore for iPhone 6s and above models. The relevant components are the connector, some small components, and the CPU. Check […]

iPhone 7 Plus Stuck at Recovery Mode and Error 9 when Restore

Malfunction Phenomenon The iPhone 7 stuck at recovery mode, and it reported error code 9 when restoring with iTunes.    Trouble Shooting According to repair experience, error code 9 usually caused by the malfunction of NAND flash U1701 or EEPROM U2301. We checked the NAND by measuring the voltage on C1721, C1702, and C1730, the […]

iPhone 7 Plus Rear Camera Not Working

Malfunction Phenomenon iPhone 7 Plus Rear Camera Not Working Trouble Shooting Take out the motherboard and measured the diode value of rear camera connectors J4501 and J3001. All the diode values we measured were normal. Then we turned on the phone and the camera app to measure the voltage of the rear camera on C2506, […]

iPhone 7 Plus Volume Down Button Not Working

Malfunction Phenomenon We can turn the volume up and down with the volume button. In this case, the received iPhone 7 Plus volume down button not working, but the volume up button works normally. Trouble Shooting According to the malfunction phenomenon, we can conclude that the problem should from the volume button relevant circuit. First, […]

iPhone 7 Plus Ringtone Not Working with Record Function Abnormal

Malfunction Phenomenon iPhone 7 Plus Ringtone Not Working, and the voice recording function also abnormal.     Trouble Shooting Disassemble the phone and checked the audio circuit, the motherboard looked good. Continue to measure the power supply for the audio IC U3101, there are 4 sets of power for the audio IC. We can measure the […]

iPhone 7 Plus Charging Issue with Abnormal Battery Data

Malfunction Phenomenon iPhone 7 Plus Charging Issue. The capacity of the battery showed 1%, but it jumped to 16% when plugged into the charging cable. Trouble Shooting According to the malfunction phenomenon, we can conclude that the problem was from the charging circuit. There are 5 main components and chips in this circuit. We can disassemble […]

iPhone 7 Plus Water Damage and Won’t Turn On

Malfunction Phenomenon Receive an iPhone 7 Plus water damage and won’t turn on. After carefully checking the cosmetics. There is some corrosion around the WI-FI module, and the water-proof label was red.   Trouble Shooting First, clean the moldy area with PCB cleaner around WI-FI, then connect with the DC power supply, the current jumped […]

iPhone 7 Plus No Backlight Issue

Malfunction Phenomenon When we receive a phone with a dark screen, the first thing that we need to do is to judge whether it’s no boot-up, no display, or no backlight issue. After carefully checking, the screen can’t be lighted on but we can see a faint apple logo. So we can draw a conclusion […]

iPhone 7 Plus Dim Screen Issue

Malfunction Phenomenon For the iPhone 7 Plus dim screen issue, it’s the left side of the screen was dim when we turned on the phone. All other functions worked well. Trouble Shooting According to the malfunction phenomenon, this was a backlight issue. First, we can change another screen to test, the phenomenon was the same, […]