Talk about the “T2” chip of Macbook

Talk about the “T2” chip of Macbook Apple T2 security chip is Apple’s second-generation customized Mac chip, it’s also a 64bit chip based on ARM V8, and running the BrigeOS operation system, it improves the security level of Macbook Pro, and used in the 13 and 15 inches models with touch bar. Apple T2 security […]

Samsung S7 Cannot Boot With 100mA Current Leakage

Samsung S7 Cannot Boot With 100mA Current Leakage Defective Model: SAMSUNG S7 Released 2016, March 11 Version: G930FD (Global; Southeast Asia) Defect Phenomenon Drop damage caused the phone chips poor soldering or the PCB inner rail broken.   Troubleshooting And Repair Connect the motherboard with DC power supply with 130mA current leakage. Trigger to start […]

Macbook A1465 2014 Version WiFi Issue

Macbook A1465 2014 Version WiFi Issue Motherboard No.: 820-3435-A Malfunction Phenomenon: When the macbook enters the system, WiFi icon was gray, WiFi function was abnormal. Possible Reasons: WiFi module was broken; The working conditions of WiFi circuit was abnormal. Troubleshooting: We removed back cover, disconnected the battery and replaced another WiFi module, then we turned […]

Samsung Galaxy Note 8 No Signal Issue Repair

Samsung Galaxy Note 8 No Signal Issue Repair experience sharing ● Version: N9500 (China) Defect Phenomenon No service when inserted with SIM card, cannot make phone calls. After receiving the cell phone, insert another SIM card to test. There do have no internet. Then disassemble the phone and check the motherboard. As we can see, […]

Samsung Galaxy A70 Water Damage

Samsung Galaxy A70 Water Damage Version: SM-A7050 (China, Hong Kong) Defect Phenomenon This device got water damaged, then cause no display and cannot boot up. Teardown the device, then clean and dry the motherboard, phone can boot and display normally. But when we dial the ‘112’ , pop up a window to remind “is opening […]

Samsung Galaxy S8 Plus Camera Issue Repair

Samsung Galaxy S8 Plus Camera Issue Repair Version: G9550 (China) Defect Phenomenon Camera function failure, exit automatically. Test with front or rear camera only, the issue still remains the same. Troubleshooting The most possible reason that cause the camera to exit automatically is the power and MIPI bus defect. For drop damaged phone with both […]

Samsung Galaxy S8 Plus Cannot Boot Then With Temperature Abnormal Symbol

Defect Phenomenon Samsung Galaxy S8 Plus Cannot Boot   Troubleshooting Disassemble the phone, connected with DC power supply with 400mA current leakage. Keep powering for 10S, the touch with finger to feel the heat area, it located on the charging IC (IF PMIC).   Then we measure the chip related rail, find the main power […]

A1706 2016 Version Can Not Be Turned On

Motherboard No.：820-00239-08 Malfunction Phenomenon: Macbook A1706 2016 Version can not Be Turned On with abnormal standby status. Possible Reasons: The converting process of 5V to 20V was abnormal; The standby circuit or the chips related with standby circuit was abnormal; Troubleshooting: We connected with power and check the current when the voltage converting from 5V […]

iPhone XS Can not Be Turned On with Current 80 mA

Malfunction Phenomenon iPhone XS can not be turned on with the current 80 mA, and can not be connected with the computer.   Trouble Shooting We disassembled the phone and checked the motherboard, there wasn’t any obvious damaged area. We continued to separate the two layers of the motherboard and checked the pads. All the pads […]

iPhone XS Max Touch Issue

Malfunction Phenomenon iPhone XS Max touch function was abnormal   Trouble Shooting We disassembled the phone and checked, there wasn’t any obvious malfunction phenomenon. Then we separated the two layers, and we found some pads were lost. We checked the pads with bitmap, the pad in red color was on the rail of AP_TO_TOUCH_SCAN_CLK which was […]

Macbook A1706 couldn’t wake up when sleep mode

Motherboard No.: 820-00239-A Malfunction Phenomenon:  Macbook A1706 couldn’t be truned on when press power button, but there was  current when plugged in power cable. Main Reson: There might be some problem with start up circuit; There might be some problem with the sleep circuit;  Troubleshooting: We removed the back cover and disconnected the battery, connected […]

iPhone XS Max Reboot Every 3 Minutes

Malfunction Phenomenon The iPhone XS Max was reboot when we take a video for around 3 minutes   Trouble Shooting We opened the reboot logs in Settings–>Privacy–>Analytics & Improvements and check the panic files. We found the keywords “WDT timeout” in panicString. Then we checked the keywords ”WDT timeout” in the logs analytics list as […]