Why is the computer network card light does not light how to solve?

One, the wiring problem

First check the home line, to see whether the joint in the house is good, whether the line after the source of interference, such as air-conditioning, refrigerators, televisions and so on, as far as possible to maintain a certain distance with these electrical equipment. It is also possible to replace the wires of the interior with a stronger anti-interference capability. Make sure the line is connected properly. Telephone line after the door to connect the junction box, and then to the separation of voice separator, a line to go phone, a gleam of the modem (separator on the callout). At the same time ensure that the quality of the line communication is not disturbed, not connected to other devices will cause line interference. And check the junction box and Crystal Head has no bad contact and whether with other wire string around. It is best to use the standard telephone line, the PC is connected with the Adslmodem twisted line. The line is one of the important factors of the quality of the image Internet. Distance from the user cable line within 100 meters of radio towers, welding machines, trams or high-voltage power transformers, such as signal interference sources, can enable users to receive clutter (copper clad steel wire shielding weak, strong reception capacity), the user line caused strong interference. The jamming signal is often the unshielded part of the wire entry, because the relay cable has a shielding layer, interference and impact are very small. If the interference in a large place with a number of shielded off the line, it will reduce the speed of interference caused by instability or drop the phenomenon. In addition, the power cable can not be parallel with the ADSL line, in case of crosstalk, leading to ADSL fault. In addition, there are many factors that cause network instability, such as signal interference, software conflict. Mobile phone This kind of radiation is big things must not be placed next to Adslmodem, because every few minutes the phone will automatically find the network, when the powerful electromagnetic interference enough to cause adslmodem flow.

Second, the network card problem

Network cards are generally PCI network card or onboard network card, choose to choose when the quality is better, otherwise it may cause poor quality of the Internet. 10M or 10m/100m adaptive nic is available. In addition, many machines share the Internet, the use of dual network cards, which is also caused by conflict is also worth attention, at this time, should pull up the LAN or other computer network card, only to connect ADSL network card to test, if the failure back to normal, and then check the two network card has no conflict.

Three, Adslmodem or network card setup problem

Modem generally has 2 modes of operation, one is the normal mode of using dial-up software, one is the routing mode of automatic dialing. In normal mode, you do not need to set up your modem, use the default. While the routing mode needs to be set up, modem with its own flash memory, you can set the account, Password box to save, the power-on automatic dialing. The most common of this method is to set the wrong Adslmodem IP address, or to set up the DNS server incorrectly. Because of ADSL virtual dial-up users, is not required to set the IP address, automatic allocation can be. TCP/IP gateways generally do not need to be set. However, setting up DNS must be set correctly and DNS addresses can be obtained from the local telecommunications department. In addition, TCP/IP settings are most likely to cause the inability to browse the Web page, generally set to automatically obtain the IP address, but DNS must be filled out. Other defaults can be used

Four, Adslmodem synchronization anomaly problem

Check your phone line and ADSL connection is not good contact, or the phone line appears to be a problem, the quality of the phone is particularly easy to cause off the line, but this problem is not good to check, so be sure to use better quality telephone lines. If you suspect the separator is bad or adslmodem bad, try to connect the outside line directly to the Adslmodem without using the separator. The connection between the separator and the adslmodem should not be too long, otherwise it cannot be synchronized. Eliminate the above situation, as long as the adslmodem can solve the synchronization problem.

Five, operating system, virus problem

In addition to the line conditions mentioned above, there are also problems with the computer system. For example, the legendary killer caused the LAN to drop the line. This problem occurs in large areas all over the country, and the virus has an impact on the host agent and the Internet Bar (LAN) of the router agent. Legendary killer is a LAN for ARP spoofing, virtual gateway address, To collect information about the legendary game in the LAN and analyze it to get the user information of the destructive software. Workflow: First of all, the local MAC through ARP spoofing broadcast to the local area network, so that the workstation in the local area network is mistaken for the gateway. This process will cause the LAN to disconnect from the Internet connection and the game to the server. To be renewed by the user When you start the game and make an account login, the account information does not go directly to the proxy server via the gateway, It is uploaded to the legendary killer software that is being ARP spoofing. Through the legendary killer's own decryption means, will obtain the account of the real user name and password. To achieve the goal of stealing a player account. Seizure Status: LAN and Internet link speed suddenly slowed down or even disconnected. Network game disconnected link, and after landing to prompt the server no corresponding. It is recommended to first check the virus, if you have the ability to reinstall the system, such as the machine using a dual network card, uninstall a network card; It is recommended that the computer is not very familiar with the user do not install a variety of firewall software, incorrect settings will cause Internet instability. Some operating systems may have compatibility issues with ADSL-related components, so you can go to Microsoft to upgrade the system or repair the system. There are conditions to be able to reload. If the software is in conflict, try to find the conflict software, uninstall it or other methods to resolve it.

Six, firewall, ie browser settings are not correct

While ADSL is less likely to be attacked by hackers and viruses, it does not rule out the possibility, especially web viruses and worms. If the virus destroys the ADSL-related components, there will be a cut-off phenomenon. If you can determine the damage and attack by the virus, but also occurs when the cut-off phenomenon should check the installed firewall, the sharing of Internet Proxy Server software, Internet acceleration software, etc., stop running this kind of software, then the Internet test, see whether the speed back to normal. If the internet is not stable, you can try to turn off the firewall first, test the stability or not, in the appropriate settings. Another firewall or IE browser failure, can also cause the normal connection, but can not open the Web page.

Seven, electrostatic problems

Electrostatic is an important factor affecting ADSL, and the power supply in the home is generally not the grounding line, coupled with a variety of electrical appliances (such as refrigerators, television) interference, it is easy to cause electrostatic interference, resulting in the ADSL in the use of frequent drop line, please the three-core socket grounding end leads and good grounding, can generally solve the problem of line off. General solution: To increase the grounding wire, to solve the problem of line off.

Viii. Software conflict Issues

ADSL access to the Internet in the way there are virtual dial-up and private line access two kinds, now individual users of the ADSL is mostly virtual dialing. and PPPoE (Point-to-Point Protocol on Point-to-pointprotocoloverethernet Ethernet) virtual dial-up software has its own advantages and disadvantages. After a variety of different operating system testing, if the operating system is Windows XP, it is recommended to use it with a PPPoE dial-up software, the phenomenon of less flow, stability is also relatively improved. If you are using Windowsme or 9x, you can use the following virtual dial-up software--enternet, WinPoET, Raspppoe. Among them, Enternet is now more commonly used one, EnterNet300 applicable to windows9x; ENTERNET500 is suitable for windows2000/xp. When you have a problem with a PPPoE dial-up software, you may want to uninstall this software and swap with a different PPPoE dial-up software, please be careful not to work with multiple PPPoE software, so as not to cause conflict. Because the telephone line is the main way of broadband access, so you must set up a virtual channel, if several dial-up software mix can cause conflicts, resulting in network and its instability. If the software is in conflict, try to find the conflict software, uninstall it or other methods to resolve it. For example, some friends bt download will lead to the network off line. It is possible to consume too many threads during download to cause disconnection.

In addition, QQ and the reason for the game fall apart from the reasons for your own computer, but also may be related to their own server restrictions and the server was attacked or failed.