Changing the screen must be turned off, because the constant power is not a test standard for wiring, so it must be switched off before it can be replaced, so it will be safer, and it will be changed faster.
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1, the phone is not off can not remove the screen. The phone needs to be turned off when the screen is replaced, otherwise some models of mobile phones are easy to burn the motherboard, and if the motherboard is burned, don't save the time.
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2, replace the screen method. Remove the card slot, use a tool to separate the phone along the gap, and remove the battery. Remove the outer screen with a sheet, separate the inner screen from the outer screen, remove the glue on the inner screen, and glue on the new dry glue. Tear off the film, align it with the outer screen, and place it in the screen press to remove the air bubbles. Install the machine, first put a layer of glue on the border, stick the parts together, and place the battery. Close back cover and insert card slot.
If there is a constant power change screen when changing the screen may lead to screen damage or motherboard burned, this situation is easier to short circuit, so in the screen replacement or maintenance must first power off and then operate
When the screen is connected to the motherboard, there will be a cable inserted into the motherboard. Live operation may burn the motherboard or screen!
It is best to power off and pull out the battery, before a person to his 16L1 screen, did not remove the battery, the screen line burned. The motherboard is disassembled, and the display may be disassembled or miscellaneous. If you can do it by hand, the motherboard can be purchased directly on Taobao. This is very dangerous behavior, non-professional personnel should not operate.