iPad 3 No Power VCC_MAIN Short

iPad 3 lost power to VCC Main voltage is the same as power loss due to Vbatt, but this case is more common.

Ways to identify iPad 3 loss of voltage source VCC Main due to Main.

• The machine lost power, plugged in, nothing. Sometimes the charger is hot and has to be pulled out immediately without paying attention, it is very flammable.
• Remove the main using the power supply just supplied and touch.