The network cable light sometimes turns on and sometimes it doesn t? The problem has been solved by

1. If you connect the network cable to the network card interface behind the chassis, the indicator light of the network card does not light up.

Generally, the crystal heads at both ends of the network cable may not be compressed, or the quality of the crystal heads is poor, and the metal on it has been oxidized for a long time.

Sometimes the network cable is not pressed on different computers, some may be able to connect to the network card normally, the indicator light is on, and some cannot be connected to the network card, and the indicator light is not on. This is the problem that the crystal head of the network cable is not pressed well.

Whether the metal piece of the crystal head is oxidized, you can see if the metal piece on the crystal head has no metallic luster.

2. If the indicator light of the network card is on after the network card is connected to the network cable, you cannot access the Internet when the indicator light of the network card is on after reinstalling the system or driving. It may be because of a problem with the NIC driver, and some NIC drivers may have some problems. You can go to the motherboard's official **** latest network card driver, so that you can solve the problem.

The drivers in the CD that comes with the motherboard are not up to date, and there may be some problems that I have encountered.

If you can access the Internet normally after reinstalling the system, do not install the network card driver in the motherboard driver CD. In most cases, reinstalling the NIC driver will not cause the NIC indicator to not light up.

3. The general socket can be used by the computer, only to see whether the socket interface is too loose. This will cause poor contact, and there should be no problem of too little power.

Also check the other end of the network cable connected to the switch or router.

Let's make a new crystal head, it should be solved.

1. It may be that the network cable is not connected well or the network cable is faulty, you can check whether the network cable is broken or broken, and then try to plug and unplug the network cable again to see if the network cable light becomes brighter.

2. In this case, it may also be that the user has disabled the local connection. If you're sure that there's no problem with the network cable, you can turn on your computer, right-click on your desktop neighbor, and then click Properties. If you see that the local link is grayed out, it means that the local link is disabled, you can right-click the local link and click Enable.

3. It may also be that the user does not turn on the network card, you can turn on the computer, right-click "My Computer", then click "Properties", select "Hardware" in the properties interface, then click to select "Device Manager", then "Network Adapter", right-click the network card, select Properties, then select General, select Device Usage in the General interface, then click "Use this device (enable)", and finally click OK.

If the above methods cannot solve the problem that the network cable light does not light up, you need to ask a professional maintenance personnel for inspection and maintenance.

1. The cable interface light is not lit, which may be because the cable is not done well or the connection is not good.

2 Replug the cable back in or check if the cable is damaged or damaged.

3 Replace the router. If the router is broken, the interface light of the network cable will not light up.

4. Right-click the network icon in the lower right corner of the computer, and click to open the "Network and Mutual Suspicion Networking" setting.

5 Check the Ethernet.

Whether it is turned on or not. <>

, enter Device Manager.

Open Device Manager.

7 Check the NIC drivers.

Whether it is installed or functioning properly.

1. The cable interface light is not lit, which may be because the cable is not done well or the connection is not good.

2 Replug the cable back in or check if the cable is damaged or damaged.

3 Replace the router. If the router is broken, the interface light of the network cable will not light up.

4. Right-click the network icon in the lower right corner of the computer and click to open the "Network & Internet" settings.

5 Check if Ethernet is turned on.

7 Check if the NIC driver is installed or working properly.

Re-turn on the machine, see if it can be connected normally, if not, see if the two ends of the crystal head are loose, plug it in again, if it doesn't work, you have to check whether the crystal head of the network cable is correct, and redo the crystal head,

Change the computer first, if you can be a computer problem, if you can't change the computer, it's a problem with network cables and connectors, whether there are mice in fate, often used to practice teeth.

Think about what you did before the failure.

Then check the network cable (it's best to try a different one).

Unplug the power cord of the main unit, let it stand for one minute, and continue to press the power button for 5 seconds (equivalent to discharging static electricity on the computer). Then connect the power supply and turn it on.

If it doesn't work, open the case to remove the motherboard battery, and short the jumper to clear the BIOS.

Change to another computer to see if your network cable port is normal, maybe the network cable crystal head has a purpose.

The common causes and solutions for the network cable light not to light up are:

1. If the network cable is not good or broken, you can replace it with a good network cable.

2. If the network card is broken, replace the network card.

3. If the power supply of the router or switch is not turned on, turn on the power of the router or switch again.

1. After power failure, open the chassis, remove the network card (independent network card), polish the gold finger with an eraser, clean the network card slot, insert the network card back when finished, plug it in tightly, enter the hardware device manager, replace the network card driver, and try again.

2. Check whether the NIC is enabled. Right-click "My Computer" - "Properties" - "Hardware" - "Device Manager", "Network Adapter", right-click the network card (the string of characters and numbers below is your network card) - Properties - General - Device Usage - Select "Use This Device (Enable)" - OK;

Also check the "Resources" for conflicts.

3. Check whether your network connections service has been started normally.

Right-click on "My Computer" Manage Services & Applications Services in the right window to check if the Network Connections service has been started, and if not, start the service.

Then register the 3 components by typing the following command in the run:

regsvr32

regsvr32

regsvr32

Finished restarting. 4. If the integrated NIC is unstable, you can change an independent NIC to update the NIC driver; If the NIC is damaged, replace it with a NIC.

First, the connection is incorrect; Second, the indicator light applauded; Third, network failure.

There are several reasons for this, the first is that the network is not working, the second is that there is a problem with the network cable, the third is a problem with the crystal head, and the fourth is a problem with the network card, you can check them one by one.

The questions are as follows:

1. The indicator light is not lit due to aging.

2. The indicator light is not lit due to the network being blocked.

PS: You can call the national unified customer service to solve the network problem for you!

What do you mean? Is the light on the NIC not lit? Or is it that the 8 groups on the hub connected by a special test network cable do not light up?

There are two lights on the network cable socket, one is green to be on, the other is orange to be on and off is normal, if it is flashing, it means that there is data exchange, which is normal.

If the interval is long, the dynamic network cable may be bright or not, which means that the network cable connector is not in good contact. The network cable crystal head is not in good contact with the computer network card, there is no data transmission, and the light flashes once every long time.

Check the power strip, including the wall outlet. Include the power plug of the network cable crystal plug to see if there is a virtual connection.

The network card cable socket generally has two LED indicators, one green and one red, which represent the connection indicator link and the signal transmission indicator ACT, respectively. The connection indicator is on, indicating that the NIC and network connection are good. A flashing signal transmission indicator indicates that the NIC is transmitting data.

In general, when the network traffic is large, the flashing frequency of the indicator will increase, and when the traffic decreases, the flashing frequency of the indicator will decrease.