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After setting, log in with the default account and password and reset.

The router reset button restores the factory settings as follows:

1. Unplug the router first, and then press the switch inside through the reset hole with a toothpick or ballpoint pen tip;

2. Then plug in the power supply and wait for a few seconds. At this time, when we go to observe the router indicator lights, we will find that several indicators will flash quickly and calm down after about 5 seconds. At this point, we have restored the factory settings by releasing toothpicks or ballpoint pens.

Note: When individual routers return to the factory, the indicator lights are turned on first and then off before flashing normally.

Black screen of mobile phone is one of the common faults in mobile phone maintenance. Generally, black screens can be divided into two types:

One is the black screen being used,

One is standby black screen.

The following are some basic reasons and solutions for the black screen:

In use, the black screen is mostly caused by the third-party software downloaded by yourself, which is rare in this machine. It can also be subdivided into two types: one is that there is a problem with the software itself, the software itself is unstable, or it doesn't match the mobile phone system, so it is very difficult for Wang Yuan to solve it and then uninstall it; The second is the conflict between software, which is a bit troublesome to solve. It needs a software to install and uninstall it. If found, uninstall it, and the problem is basically solved.

Standby black screen, let's talk about standby principle first. Because most of the direct board machines have power-saving circuit design: the mobile phone will automatically shut down if it fails to detect the key trigger signal for a long time, which is standby. When you need to use your mobile phone, a button will activate the power saving circuit, and then the screen will light up.

The reason of black screen is often reflected by the delay of screen trigger circuit. In other words, the mobile phone system issued an instruction to light the screen, but because of the delay of the circuit, the screen was not successfully lit, but the mobile phone system thought it had been lit, which caused a black screen.

Capacitance: The element that can really store energy is capacitance.

1. When we connect the capacitor to the power supply, we will charge the capacitor.

2. Charge can be kept on the capacitor.

3. When the capacitor is connected to another element with a lower potential,

4. It will be discharged.

5, so the capacitor is a "real" energy storage element.