Contact Us Order Status & Tracking Register & Log In My Cart
Computer Hardware PCs & Barebones Laptops Tablets Electronics Software Tools Deals
Browse Top Categories
Special Offers
Info

Featured Products
Mushkin Blackline 16GB (2x8GB) 240-Pin DDR3 1600MHz (PC3-12800) Dual Channel Kit Desktop Memory 997112, 9-9-9-24, 1.35V, w/ Ridgeback Heatsink
Mushkin Blackline 16GB (2x8GB) 240-Pin DDR3 1600MHz (PC3-1280...
Only $169.99

 LaCie Rugged XL 1TB USB 2.0 / eSATA Desktop External Hard Drive, Model: 301848U-R. Brown Box  *Reconditioned*
LaCie Rugged XL 1TB USB 2.0 / eSATA Desktop External Hard Dr...
Only $76.99

Logitech Keyboard Case for iPad 2 Wireless Keyboard, Refurbished. P/N: 920-003402
Logitech Keyboard Case for iPad 2 Wireless Keyboard, Refurbis...
Only $21.99

Home >> Network & Wireless >> Resources - Networking >> 

Troubleshooting Tips for a New Network Card

Troubleshooting Tips for a New Network Card


You are encouraged to make links to this article from your website and tell your friends

The following advises are based on many years of experience. They are provided as a free service to our customers and visitors. However, Directron.com is not responsible for any damage as a result of following any of these advises. You are welcome to distribute these tips free to your friends and associates as long as it's not for commercial purposes.
  1. If you can't connect to a server or if Windows reports an error after you double-click Network Neighborhood, try the following first:
    • Make sure you're using the drivers that are on the drivers disk that ships with the network interface card (NIC).
    • Make sure the driver is loaded and the protocols are bound. Check the Device Properties list for trouble indicators (an "X" or "!" symbol).
    • Test the NIC adapter with the diagnostic utilities that often came with the driver installation.
    • Check with your LAN administrator - you may need to install additional networking software.
  2. If the problem persists, follow these guidelines:
    • Make sure the cable is installed properly. The network cable must be securely attached at both RJ45 connections (adapter and hub). The maximum allowable distance from adapter to hub is 100 meters. If the cable is attached and the distance is within acceptable limits but the problem persists, try a different cable. If you're directly connecting two computers without a hub or switch, use a crossover cable.
    • Try another network cable.
    • Check the LED Lights on the NIC. Before the LEDs can be used for troubleshooting, the network interface card (NIC) must be connected to the network and the network driver must be installed. Most NICs come with LEDs near the connection. The meaning of the LED signals may be different from one manufacturer to the other. Here is a common LED description for 3COM 10/100BT dual speed NIC. Please consult your NIC manual for any difference.

LED

Description

Flashing

Steady (On)

Off

10 LNK Green: Link integrity Reversed polarity Good 10BT connection No connection between NIC & hub
100 LNK Green: Link integrity Reversed polarity Good 100BT connection No connection between NIC & hub
ACT Yellow: Port traffic for either speed Network traffic present Heavy network traffic No traffic
  1. The computer hangs when the drivers are loaded.
    • Change the PCI BIOS interrupt settings. See your NIC and system manuals for more details.
    • If you are using EMM386, it must be version 4.49 or newer.
  2. Diagnostics pass, but the connection fails or errors occur.
    • At 100BT, use Category 5 wiring and make sure that the network cable is securely attached.
    • At 100BT, connect to a 100BT hub/switch (not 100Base-T4).
    • For NetWare, make sure you specify the correct frame type in your NET.CFG file.
    • Make sure the duplex mode setting on the adapter matches the setting on the switch.
  3. The LNK LED doesn't light.
    • Make sure you've loaded the network drivers.
    • Check all connections at the adapter and the hub/switch.
    • Try another port on the hub/switch.
    • Make sure the duplex mode setting on the adapter matches the setting on the hub/switch.
    • Make sure you have the correct type of cable between the adapter and the hub. 100Base-TX requires two pairs. Some hubs require a crossover cable while others require a straight-through cable.
  4. The ACT LED doesn't light.
    • Make sure you've loaded the correct network drivers.
    • The network may be idle. Try accessing a server.
    • The adapter isn't transmitting or receiving data. Try another adapter.
    • Make sure you're using two-pair cable for TX wiring.
  5. The adapter stopped working without apparent cause.
    • Run the diagnostics program that came with the NIC.
    • Try reseating the NIC in its slot, or try a different slot if necessary.
    • The network driver files may be corrupt or missing. Remove the drivers and then reinstall them.
  6. The Wake on LAN (WOL) feature is not working.
    • Make sure the WOL cable is attached and that power is being applied to the computer.
    • Check the BIOS for its WOL setting. Some computers may need to be configured for WOL.
    • Make sure the network cable is fully attached to the adapter.
  7. Crossover cable troubleshooting tips. When you work with network cabling, concentrators (hubs or switch), and NICs from different venders, it is possible to connect everything and still have no communication between file servers and workstations.
    When there are several unknown variables, it is difficult to determine which component is broken. Use these tips to isolate the problem.
    • Determine whether your equipment complies with the 10Base-T or 100Base-TX standard. This is particularly important for hubs and switches.
    • Connect a straight-through cable from the PC to the hub. The hub performs an internal crossover so that the signal can go from TD+ to RD+ and TD- to RD- (see How to Make Network Cables). When you look at an RJ-45 connector from the front, pin 1 is identified on the left-hand side when the metal contacts are facing up.
    • Make sure that the TD+ and TD- wires are twisted together , and that the RD+ and RD- wires are twisted together. Using wires from opposing pairs can cause signals to be lost. For a 100Base-TX cable, pins #1 and #2 , and #3 and #6 must be on the same twisted strand.
  8. When there is doubt whether a hub is performing correctly, or if the impedance settings are in question, a crossover cable can help you isolate the failing component:
    • Connect a file server and a client PC back to back with a crossover cable to verify that the NIC and network operating system are properly configured.
    • To make a crossover cable, simple connect TD+ to RD+ and TD- to RD-. The cable performs the crossover that is usually performed by the hub. Make sure that two twisted-pair wires are used. If the file server and client PC function together as a small network, then either the existing cabling or the hub is the problem.
    • If there is a proper crossover, the appropriate LED comes on. If there is a straight-through connection, the LED does not light. A blinking LED indicates that there is a polarity mismatch (that is, TD+ to RD- instead of TD+ to RD+).
If a problem persists, please search for a solution or post a question in our tech support forum in our Help Desk.

If you find this article useful, please create a link to it from your website or tell a friend about it. If you have any comments or suggestions about this article, please email information@directron.us

Copyright 1997-2013 Directron.com. All rights reserved


Related Items: | Troubleshooting Tips | Steps to Assemble a System | Troubleshooting - HardDrive | Troubleshooting Tips | Troubleshooting Tips | Troubleshooting Tips | Troubleshooting Tips | How to Maintain a System? | Resources | Support |


Customer Feedback through Yahoo!
Join our Newsletter

Shipping Policy Customer Service Payment Policy
  Tracking Orders
  Est. Shipping Cost
  Time-in-Transit Map
  FAQ - Shipping
  Top Reasons for Delays
  UPS, FedEx, Postal Office
  Walk-in Sales
  APO/FPO Orders
  International
 
  Return Rates
  Statistics
  Satisfaction
  Account Applications
  Frequent Errors
  FAQ-Services
  FAQ-Tech Support
  Newsletter
  Order Status
 
  Credit Card via Phone
  Purchase Order
  Prepay, PayPal
  Resellers, VARs
  Corporate/Business
  Educational Government
  Terms & Conditions
  Price & Tax
  FAQ-Payment
 
Directron.NET- Help Desk Directron.ORG - Resources Short Cuts
  Sales Support
  Tech Support
  Knowledge Base
  Customer Service
  Open Forums
  Advanced Search of Help Desk
  How to Choose?
  FAQs, Glossary
  BYO
  Installation
  How to Upgrade?
  Troubleshooting
  Top Sellers
  New Products
  Quiet Computers
  Water Cooling
  Overclocking
  Case Painting
 

Rated 5-Star by Customers thru Yahoo! BBB Online Reliability Program Directron BizRate Ratings Rated 8.38/10 on ResellerRatings Customer Rating & Comments

HANNspree Armor 2.1 Channel 3-Piece Subwoofer & Satellite Spe...
Only $19.99

*Free Ground Shipping* HP Pavilion 15-n200 15-n201nr 15.6in L...
Only $399.99

Iview 10in 1024 x 768 TFT Capacitive Touch Screen Tablet PC ...
Only $148.99

ASUS Chromebox Mini PC Desktop Computer System CHROMEBOX-M075...
Only $377.99

Silver Zalman Ultra Quiet Notebook Cooler ZM-NC1000S, for up ...
Only $39.99

Black Bone Collection iPad Folding Stand, Model: LF10071-BK...
Only $6.99

*Free Economy Shipping* CP Technologies LevelOne WorldCharge ...
Only $18.99

*Free Ground Shipping* AMD A8-6600K 3.9GHz (4.2GHz Turbo) Soc...
Only $104.99

Gigabyte GA-Q87M-D2H (rev. 1.0) Socket 1150 Haswell Micro ATX...
Only $129.99

*$20 Mail-in Rebate* MSI Z87 MPOWER Socket H3 ATX Motherboard...
Only $197.99

*$5 Mail-in Rebate* MSI B85M-P33 LGA1150 Micro ATX Motherboar...
Only $61.99

*Free Ground Shipping* White NZXT Phantom 630 ATX Full Tower ...
Only $169.99

Western Digital Caviar Blue 3.5in 500GB SATA 6Gb/s Internal H...
Only $51.99

Western Digital Caviar Blue 3.5in 1TB SATA III Internal Hard ...
Only $56.99

Toshiba 2.5in 500GB SATA 6.0Gb/s Internal Hard Drive PH2050U-...
Only $39.99