How to Troubleshoot and Resolve any Wired NIC issues with a Desktop PC

How to Troubleshoot and Resolve any Wired NIC issues with a Desktop PC



This article provides information on how to identify and resolve issues with the integrated Network Interface Controller (NIC) on a Dell Desktop PC.


Table of Contents:

  1. Resolving an issue with the integrated NIC
  2. Hardware Troubleshooting
  3. Software Troubleshooting

Resolving an issue with the integrated NIC

This guide will take you through some general troubleshooting steps to identify and resolve any wired networking issues with your Desktop system.

Common wired network faults break down into three different categories.

  • No connection.
  • Intermittent connection.
  • Slow connection.

However some troubleshooting steps are common to every fault.


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Hardware Troubleshooting

  1. Please confirm there is no damage to the Network Internet Controller (NIC) port or to the cable.

    1. If there is damage then you will want to check your warranty status. If it doesn't include complete care then any repair will be chargeable.

    2. If there is no damage then you should proceed with the guide.

  2. Please make sure the Network cable is firmly connected at both the back of the PC and the Router or network connection point. Does this resolve your problem?

    1. Yes, then your issue is resolved and it was a physical connection issue.

    2. No, then proceed with the guide.

  3. Boot the system into the BIOS and look at the NIC port on your system, are the link LEDs on, off or flashing? You can boot to the BIOS by tapping rapidly on the F2 key as the system starts up.

    1. If the LEDs are on, then your system is picking up your network and a connection is in place. Go to step 5.

    2. If the LEDs are off then it does not detect the network and no connection is set. This means there is a connection issue proceed to step 4.

    3. If the LEDs are flashing then the NIC is communicating on the network. Proceed to step 5.

  1. Boot the system into the BIOS and look at the NIC port on your system, are the link LEDs on, off or flashing? You can boot to the BIOS by tapping rapidly on the F2 key as the system starts up.

    1. If the LEDs are on, then your system is picking up your network and a connection is in place. Go to section 3 step 1.

    2. If the LEDs are off then it does not detect the network and no connection is set. This means there is a connection issue.

      1. Confirm the NIC is enabled in the BIOS and if it is proceed to step 5.

      2. Confirm the NIC is enabled in the BIOS and if it is not - try enabling it. This will either resolve your issue or you will need to contact your technical support to take this further.

    3. If the LEDs are flashing then the NIC is communicating on the network. Proceed to section 3 step 1.

  2. Rule out a loose NIC port by shaking the NIC cable while it's still plugged at both ends. Does the NIC LEDs status change with moving the cable?

    1. If they do and the cable has been ruled out then you will need to contact your support to report a hardware issue.

    2. If it doesn't then proceed with the next step.


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Software Troubleshooting

  1. The next step is to rule the Operating System (OS) out of the issue. You can do this by two way swapping the Hard Drive in the same way we did the cable earlier and seeing if the fault follows the drive or stays with the unit? Alternatively you can boot from an Ubuntu Live CD and see if the same issue is seen?

    1. If the fault is seen when booting from the live CD or from a known good working Hard Drive, then contact your support to take this further.

    2. The fault isn't seen on the live CD or works fine with a known good working Hard Drive installed. Proceed with the guide.

Note: I would advise checking the user manual for your system type, for instructions on removing and fitting parts. If you don't have an Ubuntu Live CD you can download an ISO from the link below. To boot from a CD tap rapidly on the F12 key as it starts up and select the correct option from the Boot once menu.

  1. If the fault has been narrowed down to a software/configuration issue, then the first question to ask is whether it would be quicker to reinstall or reimage the PC than troubleshoot further. You know from the previous troubleshooting that a reinstall will definitely resolve the problem, but can be a lot of work depending on what software and data is on the PC and how you've gone about backups.

    1. If it's quicker for you, then reinstall or reimage the machine to resolve your issue.

    2. If not then please proceed with the guide.

  2. The easiest first troubleshooting step is to reset your PC to the settings it had when the NIC last worked. I've linked to guides on how to do this for the various windows OS's. this will either resolve your issue or you need to proceed to the next step.

  3. Uninstall the NIC drive from Device Manager and install the latest driver from the support site for your system type. this will either resolve the issue or you need to proceed to the next step. Go to the run box and type mmc devmgmt.msc. Open up the network Controllers on the box that appears and right click on the integrated NIC and select uninstall.

  4. Compare your Configuration to a working PC and see if there are any differences, if so change the settings to reflect those on the working system. You can bring up a command prompt and there are several commands you can check. Go to the Run box and type cmd. A black window opens with a command prompt.

    ipconfig /all

    This command lists all the connections on your PC.

    ipconfig /release

    This command drops your IP address with your Internet Service Provider (ISP).

    ipconfig /renew

    This command picks up a new IP address.

    tracert *ip or web URL*

    This command shows you how many jumps and how long it takes for the DNS to resolve an address and get you to a particular page or site. The more jumps and the longer it takes, the more likely there's a DNS issue. Reset your DNS to resolve.

    ping *ip or web URL*

    This checks your connection to a site without bringing the site up or using anything that might be corrupted or disabled in your OS. It's a very basic check.

  5. If that didn't work you can run this Mr Fixit from Microsoft to reset the TCP/IP Stack. If this doesn't resolve the issue proceed to the next step.

Note : This Mr. Fixit does not currently work on the Windows 10 Operating System.
  1. The last suggestion I can give is you may have been infected with Malware that is stopping your NIC from connecting to prevent you from diagnosing and downloading removal software. I would advise running a scan with a third party application. There are various freeware programs such as Malwarebytes available. If this type of program doesn't pick up any issues, then I'm afraid you're left with reinstalling the system to resolve this.

If you need to log a call or go through further troubleshooting you can contact us Online through Chat, Twitter and Email or you can call in to your local support line. If you go to the support site and ensure it's set to you country, then clicking on the contact us link will give you the latest information on how to get in touch.


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Article ID: SLN285431

Last Date Modified: 09/20/2019 11:40 PM


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