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HP Notebook PCs - Unable to Connect or Lost Connection to Wired Network in Windows XP
This document pertains the HP Notebook PCs with Windows XP
A notebook PC that has been accessing the internet may suddenly lost the connection. This problem may be accompanied by a browser error like, "Cannot find Server." Possible causes may be:
Also, after resuming from standby, you may experience difficulties in connecting to the network. See Troubleshooting access problems when resuming from standby .
Troubleshooting connection problems
Use one of the following methods to diagnose and repair a notebook PC that suddenly cannot connect to a wired network.
Method 1: Check network cabling
The most common causes of lost connections to the network are: loose ethernet cable physical connection, and an intermittent failure of the ISP cable service. On most PCs, there are two light emitting diodes (LED) next to the physical connection where the ethernet cable plugs into the back of the PC. The LEDs will glow or blink to indicate the current status of the network device.
Perform these steps to verify the physical connection of the PC to the internet.
Method 2: Check router and modem
The network connection LEDs will glow and blink only when there is a physical connection between the PC and network router. If LEDs are not glowing after checking the network cables and connections, perform one or more of these steps, then test the connection.
Method 3: Reinstall network drivers
If the modem, the router, and the PC have been reset, and the glowing LEDs indicate a good physical connection, but the PC cannot connect to the internet or a network resource, perform the following steps to verify the network device is enabled and to reinstall the network drivers.
Method 4: Contact ISP Support
Occasionally an ISP modem will need to be replaced or the ISP network or servers are not functioning correctly. You should contact you ISP Technical Support number for the following conditions:
The following links are to the most popular Internet Service Providers:
Troubleshooting access problems when resuming from standby
You may encounter problems when trying to access the local area network (LAN) after the notebook PC resumes from standby. If this should occur, follow the steps below:
Disable Wake on LAN (WOL)
If the Wake On LAN option is not required, you should disable WOL in the BIOS setup utility by performing the following:
Enable PME for the Intel NIC
Enable a power management event (PME) for the Intel Network Interface Card (NIC) by executing the following registry script.
NOTE: In some cases, it is necessary to shut down the system, disconnect and then reconnect the AC adapter from the notebook PC to clear the failing states.
Download and install the latest Ethernet Driver
Installing the latest Ethernet Driver may resolve this issue. For more information about downloading and installing drivers for your HP notebook computer, please see the Locating HP Software, Drivers, and BIOS Updates in Vista support document.
If the procedures described in this document do not solve your issues, please contact HP for help.