What should I do if my computer suddenly has no network and an exclamation point is displayed?

The computer won't turn on the solution:

1.Check whether the monitor, main unit cable, and connector are connected.

2.If the external monitor sees that the system has started normally, then Zhaofeng can check whether the switch button above the keyboard for turning off the power supply when the display is closed is normal.

3.If the external monitor and the pop-up display power-off switch are fine, the display cannot be displayed, then it may be a system problem.

What should I do if the computer can't connect to the Internet and display an exclamation mark:1. Click the "Network Icon" in the lower right corner of the desktop, and click the "Connected" network in the pop-up window to enter the settings page.

<>3, in the network connection interface, right-click the connected network, select "Disable" in the menu bar, and right-click the icon again to select "Enable" after disabling.

That's the end of the explanation about whether the computer is connected to the Internet and displays the exclamation mark.

Workaround:1Enable the traffic monitoring feature to see which software is taking up your internet speed.

2.Go to the traffic management page of the router gateway to check which device occupies the highest network speed and record it.

3.Go to the DHCP page of the router gateway and check whether there are any unknown devices connected to the network. Record the MAC address of the device and disable its network access through MAC filtering in advanced settings.

4.Turn off the router for 5 minutes and check whether the line connection is normal.

5.Keep your wireless router away from electromagnetic devices. Shorten the distance between network equipment and wireless routers, reduce the possibility of signal attenuation and interference, and increase wireless relay amplification to expand WiFi signal coverage.

Is there a 360 security guard on the computer, you can use it to repair it, and there is a special disconnection first aid kit tool in the 360 guard.

You can plug and unplug the network cable, restart the computer and take a look, or you can use dial-up Internet to try it out.

Take Dell G5, Win10 system as an example, the reasons and solutions for the computer not showing the exclamation point on the network are as follows:

1. First go to the network connection interface, try to disable and enable network connection, and check whether the network is normal;

2. Set the IP address and DNS server, generally there is an exclamation mark, it is an IP address conflict, click Internet4 protocol version 4; Roll along.

3. Select Automatically get the IP address, and the DNS server is set to;

4. After clicking OK, disable and enable the network connection to see if the network connection is normal and whether there is an exclamation mark.

The computer shows an exclamation point and cannot access the Internet, if you open the network connection and find that the acceptance packet cannot be accepted, it can be sent, indicating that there is a problem outside. You can check the network cable and router to see if the connection is normal and quiet. If it still doesn't work, open the details to check the problem of the computer's IP address, the wireless router should be a Class C IP address.

The above situation and method Lu Yunyu is applicable to most brands of computers such as Dell.

If you are using China Unicom Broadband, the computer network connection is not available, there may be one of the following reasons:

1. If the broadband is in arrears or expires, you need to pay or renew it in time.

2. The socks hall of the net cable is loose, and the two ends of the bridge line need to be plugged in tightly.

3. If the equipment is used for a long time, you can turn off the power of the optical modem, router, computer and other Internet access equipment for a few seconds, and then connect Li Haomeng's power supply to restart.