The wireless routers mentioned in this article are mainly wireless routers for home use. Nowadays, home wireless routers are very common, not only used in homes, but also in enterprises and institutions. Coupled with the innovation of portable mini wireless routers, wireless routers can be seen everywhere. Wireless routers are the most commonly used terminals in laptops and smartphones. Let's talk about the problems I encountered.
1. Laptops cannot access the Internet
Mobile phones can be connected to the Internet, and laptops can be connected wirelessly and wired, but they just can't access the Internet.
In the above situation, it may be the following low-level errors: First, forgetting to plug in the network cable of the router to connect to the external network; second, the network cable of the external network is not plugged in correctly, and it is plugged into the interface connected to the internal network; third, the router has a physical failure; Fourth, it is connected to other wireless signals. A higher level of error, incorrect configuration. For example, the username or password is incorrect, the router's MAC is bound, the IP address is restricted, or the DHCP service is not enabled.
The situation I encountered is that everything is configured normally, that is, the data is not forwarded. This situation gave me a headache for a few days, I couldn't check any errors, and I asked a friend to help check it, but there were no errors. From another perspective, I don't have any errors, it can only be the manufacturer's problem, the router system is unstable, or it is understood as "dead" (although it is not dead, the configuration page can open normally). The solution at this time is to restore the factory settings and reconfigure the data.
There is also a condition in which there is a congenital defect. The router will not be able to access the Internet after two or three days, and it will not be possible to forward data packets or restore factory settings. At this time, the author has two ways to deal with it, one is to put the router on for two hours, cool down and then use it, and the problem is solved. The second is to upgrade the operating system to the router and upgrade it to the latest version (some will still be risky, and the upgrade will not be successful). After a successful upgrade, the problem can generally be solved. In this case, it is best to find a seller to replace the goods, because this time the problem can be solved, it does not mean that there will be no problems in the future, after all, this situation is a product quality problem.
2. Mobile phones can access the Internet, computers cannot access the Internet
The first thing that can be determined in this case is that the router settings are basically correct because the phone can access the Internet. To be on the safe side, I checked the router configuration again to see if the firewall restricted MAC addresses from being filtered. So it seems that the problem can only be with the laptop.
First of all, I think that there is a problem with the laptop system, after all, the computer has been used for a long time, and it is inevitable that there will be a problem with hundreds of thousands of files in the operating system, but what is the problem? Narrow down the scope, check through the ipconfig command, and find that there is no gateway, only the IP address is obtained, and of course you cannot access the Internet at this time. Why can't I get the gateway address? Restart the router and computer once, and scan it with antivirus software, but it still doesn't work.
Narrow it down a little more: there is no problem with the router configuration, the problem is in the laptop system, the system cannot get the gateway, that is, the network card cannot get the gateway. There are two possibilities for this situation, one is that other programs affect the normal operation of the network card, and the other is that there is a problem with the network card itself. The first possible situation is not easy to check, starting from the second one, the simplest is of course to reinstall the network card driver, which is fast and time-saving, because the ghost version of the system comes with more drivers, so it can be installed quickly and automatically after uninstalling. After the operation is complete, troubleshoot.
But two days later, the same problem reappeared, and the solution was the same as last time, but it was unsuccessful. Then uninstall the hardware and re-scan to get the network card installation, but it still doesn't work. Could it be that other procedures are affected? Recall the new program that was recently installed, QQ updated the main program, 360 Security Guard upgraded, and nothing else was installed. After some thought, I decided to download the latest NIC driver. After the latest version of the NIC driver is installed, it is still the same, and it can be connected, but the external network cannot go out, and the gateway cannot be obtained. I don't know how many ideas I changed, but I didn't expect the later solution to be even simpler - CMOS discharge. Turn off the laptop battery and wait for a while, press and hold the laptop power for about half a minute to complete a discharge.
Summary of experience
1. The troubleshooting method used in this example is to gradually narrow the scope of possible faults. This method is often used in troubleshooting, and its key link and difficulty is to grasp the problem and think about it.
2. According to the author's experience, the wireless network card of the general notebook cannot obtain the driving relationship between the gateway and the network card, which is relatively rare in this case caused by the instability of the CMOS operating system. In fact, CMOS is a RAM chip on the motherboard that can be read and written, which is used to store the hardware configuration of the BIOS and the user's settings for certain parameters. It is also an operating system, which saves some parameter settings of the network card, and if there is a problem with this operating system, it seems that it will also affect the normal use of the network card.
|
Posted on 10/16/2014 4:42:24 PM
|
|
|
