iPad air nút nguồn bấm không được
step 1: use leaf spring to lifting jack the socket base to down mass, if it worked -> watch socket or power line. If it wasn’t -> measure resistance, if lost ->tracking to line.
step 2: measure the wire (yellow frame) and the resistance (green frame), if broke ->short lifting. The wire (green frame) use to test is fine, but should be replace for the best if error.
step 3: power button sometimes shorting -> isolate and remove capacitor (purple frame).
step 4: take a look at resistance (green frame), if rotten by water ->replace. Lost voltage 1v8 at 1 side ->borrow another voltage to lifting.
step 5: After all, take off IC source to measure, if lost resistance here -> to cpu, if has resistance ->replace IC source.
Note: check carefully socket and resistance, wire on this line. Haven’t seen it to IC source ever. In case, power button wasn’t work, and you have to hold it a while to work -> check the switch part from home line.
step 2: measure the wire (yellow frame) and the resistance (green frame), if broke ->short lifting. The wire (green frame) use to test is fine, but should be replace for the best if error.
step 3: power button sometimes shorting -> isolate and remove capacitor (purple frame).
step 4: take a look at resistance (green frame), if rotten by water ->replace. Lost voltage 1v8 at 1 side ->borrow another voltage to lifting.
step 5: After all, take off IC source to measure, if lost resistance here -> to cpu, if has resistance ->replace IC source.
Note: check carefully socket and resistance, wire on this line. Haven’t seen it to IC source ever. In case, power button wasn’t work, and you have to hold it a while to work -> check the switch part from home line.