iPhone 8 Plus can't be turned on. Troubleshooting

iPhone 8 Plus can’t be turned on. Troubleshooting

Machine model: iPhone 8 Plus

Malfunction: The mobile phone can’t be turned on.

Maintenance process:

I received a iPhone 8 Plus fault machine, and the customer described that no booting was turned on. Disassemble Connect the power supply large current, and the current jumps directly to 1.753A

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 1.
The rosin smoke method,Connect the power supply on the motherboard B found that Colophony (Solder)in the lower left corner of the power supply changed quickly.

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 2.
According to Xinzhizao Soft Boardview, there are four VCC, and Measuring diode value is Nand 3V VCC Short circuit(among them, the BOOST step-up VCC Short circuit is generally VCC 500mA).

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 3.

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 4.

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 5.

iPhone 8 Plus can’t be turned on. Troubleshooting Figure 6.
For the component The rosin smoke method(which can also be touched by hand) connected to Nand 3V VCC circuit, find out the specific faulty component, and find that it is Nand C2619 Short circuit next to Nand. If you pry it off, it will be OK.