The battery and time above the phone are not right and blurry what is going on

If the phone screen is blurry, Samsung phones are generally recommended to do the following:

1.Check the screen for stains and wipe it with a soft cotton cloth.

2.Check if all pages are blurry, change the phone wallpaper to observe.

3.Back up your data (contacts, text messages, **, etc.) and try to do a factory reset.

If the problem persists, it is recommended that you bring the machine, purchase invoice, and repair card to the local Samsung after-sales service center for testing. Samsung Service Center Address Information Customer Service**, you can inquire through the following methods: Please log in to the service center page of Samsung's official website - select the product you want to inquire about and the province or city where you are located to search.

The reason for the wallpaper can be solved by cropping the wallpaper.

Another battery with a known positive and negative electrodes and a small light bulb are also required.

I connect two storage batteries with a lead end and connect a small bulb in string and turn on a switch.

When the small bulb will light up, the two batteries are connected with positive and negative poles, because the positive and negative poles of one of the batteries are known, so the positive and negative poles of the other battery can be launched.

1. Use salt water to determine the positive and negative electrodes of the battery. Connect a wire at each end of the battery, insert it into the salt water, check the wire end, the end that produces more bubbles is connected to the negative electrode of the battery, and the end that produces less bubbles is connected to the positive electrode of the battery. (There is a point of emphasis, the container containing salt water must not be conductive, and it is generally better to use a porcelain bowl.)

In addition, in addition to the commonly used salt water, alkaline water, dilute sulfuric acid, etc. can be used as long as it can be used into an electrolyte. ）

2. Indirect light bulb at both poles of the battery constitutes a circuit. Place a small magnetic needle under the wire that makes up the loop. The direction of the magnetic needle should now be perpendicular to the direction of the wire.

Using the right-hand rule, the direction of the thumb is the direction in which the current flows. Current flows out of the positive terminal of the battery and back to the negative terminal of the battery.

First: Try the touch with any ammeter, see the direction of the pointer deflection to judge the positive and negative electrodesSecond: Use a light-emitting diode with known positive and negative electrodes, which emit light in the positive direction, and do not emit light in the reverse directionThird: Touch it with your hands, the positive electrode with inductance or electrocution, and the negative electrode that does not respond to a friend of yours (Class 49).

With a light-emitting diode with a known positive and negative electrodes, the forward conduction emits light, and the reverse cut-off does not emit light.

Connect a current or voltmeter and look at the pointer bias.

The multimeter voltage - the level of the level will be known.

There are three main reasons for this:

1. The focusing potentiometer of the FBT (line output transformer) is loosened or displaced due to vibration during transportation or use, which changes the focusing voltage added to the CRT (deviates from the optimal voltage value debugged by the factory), causing the screen to be blurred;

2. The humid environment around the monitor causes rust on the discharge ring (semi-sphere) of the focusing pin on the CRT tailstock board, and it is blurry when the CRT is just energized;

3. Due to the impurities in the manufacturing process or the glass shell of the CRT cone, electrostatic dust is generated between the focusing (focuse) pole and the acceleration pole (G2), which forms and resists and causes serious blurring of the screen.

2. Determine the cause according to the different situations caused by the phenomenon of blurred screen.

Judging by the program with a blurry screen:

1 If the blurring is mild, it is only the thickening of the glyph outline that still makes the character recognizable, which is mostly caused by the first cause.

2 If the CRT is blurry when it is first turned on, the characters on the screen become clearer and clearer as time goes on, which is usually caused by the second reason.

3 If the characters are heavily blurred over a large area, the screen is white and the characters are unrecognizable, and the brightness of the focusing potentiometer screen on the FBT is dimmed, it is the third reason.

3. Troubleshoot after judging the cause of the screen.

1 In the first case, open the lid and fine-tune the Focus potentiometer in the FBT to troubleshoot.

2. For the second case, for the treatment of the corrosion of the discharge ring of the focus pin on the tail plate, the discharge ring and the electrode plugs and sockets on the tailstock are generally cleaned with anhydrous alcohol, and the tailstock parts can be replaced when the discharge ring is seriously corroded.

3 For the third case, remove the CRT tailstock plate, and lead the 24KV high-voltage multimeter pen cable of the high-voltage cap on the CRT (it is best to use a digital multimeter with better insulation performance) into the CRT focus board socket, and open the monitor.

Flow power supply, the meter pen line used to ground the accelerator (G2) plug for instantaneous discharge 2-3 times (it is best to use the (G2) plug on the CRT with an external protective sleeve ** to lead out, and carry out the instantaneous discharge operation of the lead wire).

Either the calculator circuit is not in good contact and the numbers are still beating frequently, or change the battery to see if it is almost out of power.

How big is your monitor, each size has its own corresponding resolution, you must adjust to the recommended resolution monitor to achieve the clearest degree, you have this problem should be the monitor, it is 1366 768

The monitor is aging, so let's get a new one.

It can also be measured with a voltmeter, if there is no tool, observe the battery head, the general situation is that the positive electrode is thick and the negative electrode is fine.

The positive pole is a little thicker, and the negative pole is a little thinner.

Red represents the positive electrode, and black represents the negative electrode.

Hello, the positive battery pile is a little thicker, the negative electrode is thinner, or do not need to be measured with a multimeter.

Let's say you can use other tools:

1. The area of the negative electrode of the dry battery is definitely much larger than that of the positive stage;

2. Multimeter measurement;

3. The diode string bulb depends on whether the bulb shines or not;

4. Connect in series with another dry cell bulb, and then connect in series in the opposite direction, and see the brightness change of the bulb to determine the positive and negative poles;

Hello and thanks for using Samsung products!

According to your description, there are two ways to view your phone's S n code:

Method 1: After the phone is turned off, open the back cover of the phone, take out the battery and check the S n code information in the cover.

Method 2: The outer packaging box of the mobile phone is labeled with an S n code.