A: The black spot on the power button spring sheet has fallen off. Just stick a hard object of similar size on it.
Q: The wifi has turned gray. I have dropped it before. Can it be repaired?
A: Replace the WIFI module
Q: Hello, the phone loses 50~100mA when it is turned off. It loses 75% after not playing for a day. Is there something wrong with the power IC?
A: If it is a power problem, it usually cannot be turned on. If your phone is flooded, go to the repair shop. It is estimated that the original parts are short-circuited and heated.
Q: Why is the "+" sign tight and the "-" sign loose? If they are loose, they should be loose together! Please answer
A: This is normal. The two buttons are originally separate, and the loss of the spring sheet is also different.
Q: The power button collapsed. Within the warranty period, should I replace or repair the phone?
A: The machine within the warranty period must be replaced, and the after-sales service can only replace parts such as the camera. I recommend you to change the phone, after all, the warranty is renewed for one year.
Q: Is there a sealant on the wifi module of 4s?
A: It is a very thin layer, which can be removed directly with an air gun. Unlike other parts with thick sealant, the sealant of 4S is much more difficult to deal with than that of 4.
Q: Symptoms of iPhone 5 model. The front camera cannot be turned on after the screen is replaced. The new camera cannot be turned on. I heard that there is a problem with the motherboard. No one knows how to fix it?
A: Use a multimeter to measure the resistance around the camera to see if there is a short circuit or damage. This is basically the problem.
Q: Why is there no sound when I unplug the earphones?
A: Try to unplug the earphones and press the volume button to adjust the volume. Is it displayed as a ringtone or earphones? If it is the earphones, it is usually the audio cable that is broken. If it is a ringtone, it is a problem with the earphone. If it is a problem with the earphone, it is a problem with the power-on cable.
Q: After the old iPhone 4 phone has been put aside for a period of time, the wifi can be turned on, but no network can be found?
A: Try to put the phone next to the router and try again. If there is a weak signal, it is the problem of the WIFI antenna cover. It may be that the contact is oxidized and the contact is poor.