Cause one: The wifi password is incorrect
When we encounter the problem that we can search for the wifi signal but cannot connect, the first thing to do is to check whether the input wifi password is correct when connecting the wifi signal.
If you enter the wifi password is not correct, then your phone or laptop will certainly not be able to connect to this wireless wifi signal.
Solution: It is recommended to connect the computer to the LAN interface of the router with a network cable, and then log in to the Settings page of the router in the computer, and then find the \"wireless Settings\" option to check the correct wifi password.
Cause two: The wifi cache is faulty
Mobile phones, laptops, tablets and other wireless devices, generally after the first connection to a wifi signal, the wifi signal and the corresponding wifi password will be saved. In the future, the device can automatically connect to this wifi signal, without requiring the user to enter the wifi password every time.
However, if the wifi password in the router is changed; The phone or laptop will still use the previously cached wifi password to connect, which will cause the problem of not connecting to the wifi signal.
There are 2 solutions to the wifi cache problem:
1. Delete wifi cache
Since the wifi password cached in the mobile phone or laptop has expired, it is not consistent with the current password of the wifi signal. Then, we only need to delete the original saved wifi record information, and re-search the wifi signal, the correct input wifi password can be.
2. Change the wifi name
You can also change the wifi name to solve this problem, because when the wifi name is changed, mobile phones, laptops and other wireless clients will think that this is a new wifi signal. When we connect to the changed wifi name, we will be asked to enter the wifi password again.
Use the computer to log in to the Settings page of the router, find the \"wireless Settings\" option, you can modify the wifi name, after the modification of the mobile phone, laptop connected to the new wifi signal, you can connect.
The third reason is that there are too many wifi connections
An ordinary home wireless router generally supports more than 10 wireless clients to connect to wifi signals at the same time. If the number of mobile phones and laptops connected to the wifi signal is too large at the same time, there will be problems of not connecting to the wifi, or unable to access the Internet after connection, and the network speed is slow.
Therefore, please check and confirm the use of your home router to ensure that the number of wireless clients connected to wifi Internet access at the same time does not exceed the maximum number of supports of the router.
In addition, you can also check whether the router's wifi has been rubbed off, and do a good job of anti-rubbing Settings.
In the wireless router, you can set restrictions and prohibit a mobile phone or computer from connecting to the router to surf the Internet. If your mobile phone, laptop is restricted, then there will be problems that you can search for wifi connection.
If you have the router's administrator password, you can log in to the router's Settings page to view and turn off the related restrictions.
The two functions of \"Device management\" and \"Wireless Access Control\" in the new tp-link router can be used to limit the Internet access of mobile phones and computers, so it is OK to check the Settings of these two functions.
Disable wireless device access control
Turn off the feature that restricts wireless device connections
Cause five: The router is faulty
The quality of some routers is not good, after a long time of operation, there will be instability, crash and other problems; It may also cause the problem that the wifi connection can not be searched.
1. Power off and restart
You can try to turn off the power of the router first, wait a few minutes, and then switch on the power of the router, and finally test whether the wifi signal can be connected.
2. Restore factory Settings
If all the previous methods have been checked and excluded, it still cannot solve the problem. At this time, it is recommended to restore the router to factory Settings, and then reset the router Internet access, reset the wifi name and password.
Now hotels can access the wireless Internet, you need to find the name of the hotel's wireless Internet router, after finding the name, you need to ask the attendant or check the use guide of the hotel inside, there is a material to find the password of the router WiFi, you can connect with the password, and you can use it only if you connect your phone. This is relatively simple is to see the WiFi password, and then ask the waiter can be.
It is the reason why the signal is relatively poor, maybe the yy his limited range, you just on the edge of his limited range, at this time to receive the signal, but there will be some instability or even failure when connecting, at this time you can contact the hotel, call him to enhance the WiFi signal, increase the WiFi transmitter equipment, to facilitate the use of the hotel
Possible causes and solutions for not connecting to WiFi network:
1, first check whether the wireless router is working properly, you can use other mobile phones or digital products to connect to the WIFI signal, if you can normally connect and normal Internet access, then generally speaking, the router can work normally.
2. Turn off the network by turning on the sleep state of the phone.
Check whether the option to turn off the network in the sleep state is enabled on the mobile phone. After a period of time, the mobile phone will be disconnected or cannot receive the background chat software. The possible cause is that the function of turning off the network in the sleep state is enabled by mistake.
3, use the router for a long time, the router may appear suspended animation phenomenon. Restart the wireless router.
4, the type of certification is not appropriate. Try to change the authentication type of the router. It is better to select the secure WPA2-PSK mode, and the following encryption algorithm is best to select AES.
5. The network Settings of the mobile phone or router are abnormal. Consider restoring router factory Settings and cell phone network Settings.
Possible causes and solutions for not connecting to WiFi network:
1, first check whether the wireless router is working properly, you can use other mobile phones or digital products to connect to the WIFI signal, if you can normally connect and normal Internet access, then generally speaking, the router can work normally.
2. Turn off the network by turning on the sleep state of the phone. Check whether the option to turn off the network in the sleep state is enabled on the mobile phone. After a period of time, the mobile phone will be disconnected or cannot receive the background chat software. The possible cause is that the function of turning off the network in the sleep state is enabled by mistake.
3, use the router for a long time, the router may appear suspended animation phenomenon. Restart the wireless router.
4, the type of certification is not appropriate. Try to change the authentication type of the router. It is better to select the secure WPA2-PSK mode, and the following encryption algorithm is best to select AES.
5. The network Settings of the mobile phone or router are abnormal. Consider restoring router factory Settings and cell phone network Settings. A wireless network is a network that uses wireless communication technology. Wireless networks include both global voice and data networks that allow users to establish long-distance wireless connections, as well as infrared technology and radio frequency technology optimized for short-range wireless connections, and the use of wired networks is very similar, the biggest difference is the difference in the transmission medium, the use of radio technology to replace the network cable, and the wired network can be mutual backup. At present, wireless network mainly uses three technologies: microwave communication, infrared communication and laser communication. The current satellite network is a special form of microwave network, which uses geosynchronous satellites as relay stations to forward microwave signals. A synchronous satellite can cover more than 1\/3 of the earth's surface, and three synchronous satellites can cover all communication areas on the earth's surface.