iPhone 6 Plus phone card white apple repair

Machine model: iPhone 6 Plus

Malfunction: Mobile phone card Stuck on Apple logo

Maintenance process: take it apart, turn it on with DC power supply, and find that current of change does not enter the system when the current goes up to 1A or so, which is the fault caused by charging. In this case, the first thing that is suspected is that there is a problem with the USB chip.Recovery mode is not online as expected, remove the motherboard and replace the USB chip.

iPhone 6 Plus phone card white apple repair figure 1.

After replacing DC power supply, boot the system normally. After installation, boot the machine Stuck on Apple logo Restart repeatedly. It can boot normally with DC power supply, and boot Restart repeatedly with battery. The first thing that comes to mind is that the battery has a problem.

multimeter battery VCC found only 3V (normally not less than 3.7v), activated the battery with the battery activation board, found that the battery could not be charged, replaced the battery again, the machine started normally, the charging was normal, and the maintenance was finished.