Sony Aison st18i will gray screen, Sony Ai LT18i black screen problem

This is a common problem of ST18i,There are a lot of friends who have this problem,The reason for not having this problem is basically that there is no root or the system is not updated,But all rooted machines will basically have a gray screen,Change the kernel,Change the ROM,It's useless to brush back to the original version,The gray screen still appears,The phenomenon is generally that the higher the temperature of the mobile phone, the more serious the gray screen,You put the phone in the refrigerator for a while,Just take it out and just press it to wake up the screen,But after restoring the normal temperature, the gray screen comes again。

Therefore, the most effective and feasible method so far is: change the screen, pro ** Feel free to search for the ST18i screen, come out a lot, just buy the first one, and it's 70 yuan

I've tried a lot of methods, but they can't solve the gray screen phenomenon, only change the screen, although some people say that the gray screen will still be gray after a while after changing the screen, but there is no better way than this Anyway, I have changed it for a few months now, and there is no problem. It's a big deal for a while. I changed it anyway.

In addition, the tool for disassembling and changing the screen is a T5 hexagonal screwdriver, which is not a technical job, you can change it yourself, it is best to take a look at the dismantling **, don't use too much force, you can't disassemble it if you exceed that strength, you have to see if there is any place that is buckled.

Of course, you can also use it for a different phone, if you are willing to abandon the little 8 Anyway, in general, I haven't seen a phone that looks more beautiful than the ST18i, I wish you all the best

You're buying a refurbished machine, right?

1.The Sony Ericsson proximity sensor is a separate device, a moving part, unlike other mobile phones that are fixed on the motherboard, and generally do not move the position, because the sensor is a very sensitive and tiny thing, the position is slightly offset, and the infrared rays shine on the backplate, mistaken for being on the call all the time.

2.The distance sensor package leaks light, causing the infrared light to be received by itself, so the sensor mistakenly thinks that there is no change in distance.

3.Pulling out the battery and restarting it can be restored, indicating that the sensor hardware is not broken, but there is a problem with the working state.

4.A single click on the top left corner of the screen (pressing your finger on the back of the sensor, which is the tick on the back panel) will restore it, so guess it's the proximity sensor that's wrong. To be precise, the SE's default proximity sensing parameters are too sensitive, and there may be problems with the parameter settings.

The problem can be determined to revolve around the light sensor, it may be a light displacement, it may be a light leakage, or it may be a problem with the system parameter setting. Around these points, there are the following solutions:

1.Hardware fixes.

This method needs to be disassembled, remove 6 screws, forcibly open the back panel, and find the composition of the sensor, which is a moving part, and this part of many mobile phones is fixed on the motherboard, and generally will not move the position, because the sensor is a very sensitive and tiny thing, and a slight deviation in the position will be a problem. If the sensor moves, take it apart, wipe it, align it, and put it back on.

2.Modify system parameters.

The premise of this method is that you need to root your phone.

Open the HW with the RE browser, press and hold it, select "Open in Text Editor" in the menu that appears), and find the Proximity Sensor below.

val_cycle=2

val_nburst=7

val_freq=3

val_threshold=15

val_filter=0

val_cycle=2

val_nburst=8

val_freq=2

val_threshold=15

val_filter=0

esac put ".

val_cycle=2

val_nburst=8

val_freq=2

val_threshold=15

val_filter=0

Delete (i.e. from the * sign to; number, all deleted).

Save, exit.

If the screen is still black after restarting, open hw to see if it has been restored, if so, change it again according to my method, and delete the hw in the directory after saving.

3.Temporary solution.

Press the upper left corner of the screen, press the back of the sensor, that is, the hook position of the back panel, hold the mobile phone in your right hand, and tap the front sensor position firmly towards the left palm a few times, and it will be successfully solved.

Mine is in the same situation as you, I went to ask the maintenance master, said that it was a display problem, he said, 18i, the probability of a bad screen is very high, but the strange thing is that the black screen has a very small chance of happening at night or when the light is not strong, I will teach you a method, if the black screen is not unplugged, or you put it in your pocket and wait for a while, there may be a reaction after a while, if you have a charger next to you, plug it directly when it is black, and it will not be black immediately.

1. Try a different memory card.

2. Settings - Privacy - Factory Reset Try it.

What's going on? Does it happen only when you're playing ** or does it happen occasionally when you play on your phone?

Flash it, first of all I don't know if it's a hardware problem. Then I'll use the software method to solve the problem. First, you'll have to unlock your smartphone and then flash it. There is a detailed tutorial on the specific flashing method on the MIUI forum. If you don't understand anything, keep asking me.

If you haven't solved it in the online forum, it is recommended that you go to after-sales service.

**170 is solved immediately by changing the screen.