What is the reason why the mobile phone screen appears half-screen?

When a mobile phone appears half-screen, it is usually a problem with the liquid display or the output of the motherboard. You have changed the motherboard, so the second item can be crossed out.

Let’s talk about the key points.

Your mobile phone is a full-screen handwriting, that is to say, your mobile phone has two screens, one is the touch screen, and the other is the liquid display. First, check whether the handwriting function of your mobile phone is intact and whether you can touch the screen as usual. If there is no problem, damage to the touch screen can be ruled out. Then, look carefully at the light to see if the liquid display is broken. If not, then the integrated chip of the liquid display is broken. Of course, there may also be other problems. The main thing is to confirm the above problems first.

Then, when you return to the factory for repair this time, remember to take a piece of paper and write on it: Multiple repairs, requiring liquid change. After writing it, tie it with the warranty card and return it to the factory. When you come back again, there should be no problem.

Finally, for the two previous repairs, did you get a maintenance order with the specific fault and the repairman number? If there is, please keep it well. After you repair it for the third time, that is, after this repair, this kind of situation will still occur. You can ask the manufacturer to replace it. According to the three-guarantee method, if the product is repaired three times and it fails, the customer can request a replacement. If the maintenance order is accidentally lost, it doesn't matter. You can still return it to the factory, which also has a stub.

That’s about it.