Question 1: What's wrong with the network card? Cause you this phenomenon of many reasons, the following aspects are also the root cause of this phenomenon, you may wish to press the following aspects to carefully and completely, thoroughly check; your problem is not solved. Copyright: This answer for the harmony of the original, no one shall steal! 1: Check the power supply (after the transformation of the two networks across the country, including remote mountainous areas 99.98 of the voltage are qualified, there is no low-voltage; low-voltage is caused by the user wire diameter is too thin, replace the household line can be) 1.1 with a multimeter to check whether the power supply is stable? 1.2 Is the AC voltage fluctuation within the allowable range? 1.3 Is the ripple coefficient (checked with a millivoltmeter) after A/D conversion of the power supply qualified? 1.4 Is the temperature rise of the power supply abnormal? 1.5 Does the voltage stabilization characteristic conform to the technical specifications? 1.6 Do the voltage stabilization characteristics and ripple coefficient under rated load meet the technical specifications? 1.7 Does your power supply capacity meet the requirements when replacing a large fan? 1.8 Generally, the power supply of auxiliary equipment (routers, network switches, cats, etc.) are rectified power supplies without voltage regulation, with larger ripple coefficients (which may be caused by drying out of filter capacitors) and poorer load capacity; special attention should be paid to this. 1.9 Due to equipment over-voltage (like feeding a child, more can hold up), under-voltage (like feeding a child, less will be malnourished), voltage fluctuation is too large (like feeding a child, hungry, full of a variable amount), over-current, heat, resulting in overheating protection action to cut out the fault and will be out of the operation of the equipment (i.e.: it will produce a slow, delayed, repeated start-ups, delayed, drop-outs, interruptions, Disconnect, automatic shutdown, crash and other manifestations), etc.; 1.10 power supply overcurrent protection and overheating protection is the correct action? Is the action sensitive? Is it refusing to act or misbehaving? 2: Check the network cable and crystal head (R45): 2.1 crystal head and seat is plugged (loose?)? 2.2 Is the contact good? What is the contact resistance? 2.3 Is there any dust accumulation? Is it oxidized? 2.4 Is the mechanical latch of the crystal head and holder latched? 2.5 Is the latch secure? 2.6 Are the network cable and the crystal head compressed and in good contact? 2.7 The insulation resistance between the wires of the network cable (using a 100V rocking meter), should be greater than 20 megohms. Copyright: This answer for the harmony of the original, no one may not steal! 3 : lightning protection, grounding: grounding is mainly to protect the safety of people and equipment! Lightning will burn the network card; serious cases can cause fire and casualties ! Multi-point grounding, repeated grounding, grounding is the principle of proximity; grounding is divided into protective grounding, shielding grounding, grounding, etc.; static electricity is the culprit causing the blue screen of death! I used a noise meter to test the grounding of the noise voltage is greater than the signal more than 6000 times, you do not ground, such a high noise you can work on the equipment? Grounding is the most basic requirements of IT, analog equipment is such, digital circuits is more so, from all aspects of the interference can be reduced or eliminated by grounding, foreign interference and local, local inter-circuit wiring between the coupling can be reduced and eliminated, do a good job of grounding and shielding of the equipment, a lot of interference from the shielding is not good, grounding is bad, a lot of people are only in the software to do the work, a lot of interference is caused by the poor grounding or no grounding. Poor grounding or no grounding caused by this failure is very easy to produce, but also easy to be ignored by many people, a lot of equipment damage and grounding is directly related to the lack of grounding or poor grounding can lead to inter-code interference, misuse of code, delays, packet loss, intermittent, dropped (disconnected, interrupted), dead, card, automatic shutdown, repeated startups, repeat startups, frequent reboots (or repeatedly with the connection) and other phenomena. Grounding must have more than two grounding electrodes, each grounding electrode between the minimum interval of 10 meters or more, grounding electrodes to the machine room grounding line shall not have any joints, respectively, with a cross-section of not less than 25 square millimeters of soft copper wire introduced into the machine room sink (intermediate is not allowed to have any joints), grounding line and Faraday network symmetrically connected to facilitate shunt dispersal, and the sink to the point of connection to be coated with silver powder conductive paste, each device to the Sink (independent) of the grounding wire cross-section shall not be less than 4 square meters of multi-stranded soft copper wire, sink for each grounding electrode grounding resistance of less than 5 ohms (the smaller the better). At least two or more times a year using a grounding meter (2.5 level or higher grounding meter measurement, and the meter in the scope of the inspection qualification period) to check. When checking the grounding electrode, it is strictly prohibited to do so under thunderstorms. It is strictly prohibited to use the N-zero wire of the water pipe and power line as the grounding use; that is, the independent grounding device. Each device's wire is independently connected to the busbar in the machine room, and it is strictly prohibited to connect the busbar after series connection. I can be very subjective: whether you are ...... >>

Question 2: What's wrong with the computer's internet connection? 1. Click "Start ?ú Run" command, type "gpedit.msc" and enter, run the "Group Policy" program, in turn, expand the Computer Configuration→Administrative Templates→Network→Qos Packet Scheduler", double-click the "Limit Reservable Bandwidth" item in the right window to open the "Limit Reservable Bandwidth Properties" dialog box, select the "Limit Reservable Bandwidth" option, and then select the "Limit Reservable Bandwidth" option. Open the "Limit Reservable Bandwidth Properties" dialog box, select the "Enabled" option, and then set the value to "0" in "Bandwidth Limit".

2. Optimizer's Network Optimization Fill in the Maximum Transmission Unit Size: 1492, Maximum Data Segment Length: 1452, and Transmission Unit Buffer: 262080

3. Often anti-virus to prevent toxicity 4. Go to the telecom to add bandwidth, but this costs money

Question 3: How do I do when my network card is out of order? The problem is that the computer is not a good idea, but it's a good idea! No general sudden drop computer network card hardware will not be bad (except Dan special circumstances) you unplug the cable from the plug to try or try on other computers can not be on if it still shows that the network cable is unplugged, then it should be that side is not plugged into the router

Problem 4: Laptop to buy a network card in the end what is going on ah No.

You said that the network card can not be used for the purpose of the network card, but it is not a problem.

You are talking about a wireless Internet card.

1, buy 4G Internet card, usually a monthly package, by time, or by traffic billing.

2, buy 4G card Internet access device, according to the 4G you buy the corresponding device.

3, after the 4G Internet device is powered on, it transmits a wifi signal, so that your mobile device can connect to this signal to access the Internet.

Question 5: How to check whether the computer network card is bad Click on the bottom left corner of the computer Start - - Run - - Enter ping 127.0.0.1 -t (ping and 1 after the space, their own direct copy and paste over the line), if there is a return to the data, then the machine network card is not damaged, such as not pass, said that the network card driver failure or the network card is bad ha

(which indicates that the network card is not damaged).

Problem six: computer Internet card how to do Problem Analysis: Your computer configuration is absolutely no problem, if the flow is not up, either your cat has a problem, or you are connected to a router or switch has a problem, the big one is that you have a problem with the line.

Problem solving: 1, use the 360 flow manager to test the speed, 3M, then the speed of 300KB / S above normal, if only 100 more points, then it is not normal, before the test to close the other applications.

2, to see your process inside the background there is no player running, such as the wind, PPS, fast broadcast, Baidu video and so on the film in the background is not closed, you use the 360 traffic manager directly into the background to force the closure of the

3, directly hit 10,000, press 0 to transfer to the artificial service, ask them to give you over there to test the speed of the network, or ask them to give you a terminal!

Question 7: What about the computer's Internet connection?

Super Rabbit

The system garbage, dead, stuck, network together optimization (including the solution to the slow start, shutdown)

First, clean up the disk and organize the disk fragmentation.

1, in my computer window, right-click to clean up the disk drive - "Properties" - "Clean Disk" - check the files to be deleted - OK - Yes.

2, clear the temporary files, start - Run - type %temp% - OK.

3, use Optimizer or Super Rabbit to clean up the registry and junk files.

4, organize disk fragmentation - Start - All Programs - Accessories - System Tools - Disk Defragmenter - Selected C - Analysis - Defragmentation.

ii. Optimize your computer with Optimizer or Super Rabbit.

iii. Optimize BIOS settings.

1. Go into BIOS and change the default settings to optimized settings.

? After turning on the computer or restarting the computer, press the "Del" key to enter the BIOS setup interface, in the open interface to find LOAD OPRIMUM SETTINGS (load the motherboard BIOS factory settings), which is the factory BIOS optimization settings.

There is the LOAD HIGH PERFORMANCE DEFAULTS option, which is used to load BIOS optimization settings.

Use the keyboard arrow keys to select the optimized value, then press the ESC key, press F10, Y, Enter, or select SAVE&EXIT SETUP, press Y, Enter, to save the changed settings and exit the BIOS setup.

2. Turn off the floppy drive.

Reboot, press Del into the BIOS to find BIOS FEATURES SETUP, selected, enter to open the BIOS FEATURES SETUP interface, the D rive A : after the 1.44m 3.5in, change to None (off), press the Esc key to return to the main interface, save and exit.

3. Turn off boot floppy drive detection.

Start the computer, press the Del key to enter the main BIOS setup interface, find Advanced BIOS Features (Advanced BIOS Parameters) and press Enter, in the interface will be "Boot Up Floppy Seek" set to "Disabled". In the interface, set "Boot Up Floppy Seek" to "Disabled", press Esc key to return to the main interface, save and exit.

4, open the fast boot self-test function

Start the computer, press the Del key, enter the BIOS setup main interface, select "Advanced BIOS Features" (advanced BIOS setup features) settings, press the Enter key, in the interface will be "Quick Power On Self Test". "Quick Power On Self Test" (Quick Power On Self Test) item, set to "Enabled" (allowed). Save and exit.

5. Set the hard disk as the first boot. Reboot, press Del into the BIOS, find Advanced Bios Features (Advanced BIOS parameter settings) press Enter in the interface will be First Boot Device set to HDD-O (hard disk boot), save and exit.

Fourth, upgrade and optimize the graphics card, sound card, network card and other drivers.

V. Optimize your PC settings.

1. Disable the idle IDE channel.

Right-click "My Computer - Properties" - "Hardware" - "Device Manager", in which open the IDE ATA/PATA controllers", then enter the primary and secondary IDE channels, select "Advanced Settings", set "Device Type" to "None", and then select "Device Type". Select "Advanced Settings", set "Device Type" to "None", and "Transfer Mode" to "DMA (if available)".

2. Set up boot and failover.

My Computer - Properties - Advanced - Startup and Failure Recovery - "Settings", in the System Failure area, remove the events written to the system log, send management alerts, automatic restart of the front of the hook; will write debugging information is set to none; click Edit, in the pop-up notepad file: [] [Operating Systems] timeout=30 to write debugging information to the system log, [] [DMA (if available)], [DMA (if available)], [DMA (if available)], [DMA (if available)]. Operating Systems] timeout=30 Change 30 seconds to 0 seconds.

3. Close some startup programs ...... >>

Question 8: How do I test if my computer's network card is broken? 1) If the broadband itself, the first direct connection to the broadband network cable test, if the broadband problem, contact broadband customer service to solve the problem.

2) If the router is the problem, if the original can be used, temporarily can not be used, my own practice is one is to disconnect the power supply of the router in the plug, and so on will see. There is to restore the factory settings, from the new set up in strict accordance with the instructions can be used, they do not understand, do not recommend that they arbitrarily set up (this is the premise of the physical connection is correct, and sometimes the router to find the IP address of the slow or failure caused by the router does not mean that the router is bad).

If you can not always solve the problem, it is recommended to call the customer service of the router, they have a telephone online guidance, I encountered problems that I can not solve, consulting them to give advice is very useful, they will give you the right advice for your setup or operation.

3) If you turn off the wireless switch to turn it on, if you use software to connect to the wireless, the software is not good and often out of the question is very normal, there is no better way, use the router. In addition, the driver of the network card is not or inappropriate caused by the network cable interface or cable is not a problem.

4) If it is caused by system problems, it is recommended to restore the system or reinstall.

Question 9: What is the problem with my computer's Internet connection! 1, open my computer right-click on the c disk, click on Properties General if there is a compressed drive has to save space on the disk do not choose. 2, right-click on my computer click on Management click on Device Manager click on IDE controller, click on the main IDE controller click on the Advanced Settings Transfer Mode select DMA, the same way to set up the secondary IDE.

After setting up these and then try again if you can't, it may be a network problem. If you can't, it may be a network problem, you have to add details of your home Internet access before I can judge, such as what broadband? The first thing you need to know is whether you have a wired or wireless Internet connection. If it's wireless, what brand of wireless router do you use? Did you set a password for the wireless router? If the router and the broadband cat have been turned on and off and so on, these factors will affect the speed of the Internet

Question 10: What's the deal with the wireless Internet card and the wireless network card? Wireless Internet card is a mobile, Netcom, Telecom business, the card is like a cell phone card, with a card reader inserted in the computer to use, each place charges different.

The wireless network card is the hardware of the computer, as long as there is an unlimited signal can be received. Now there is a kind of dabbing card, free to crack the network password, is a signal amplifier + network card, this free... But it is not recommended to use...