Limited Connection – Network Issue

Disable LAN Power Save in BIOS.

Look here: http://h30434.www3.hp.com/t5/Notebook-Hardware/ethernet-card-disables-when-unplugging-power-cable/td-p/104485

Dutch

I've seen the same problem pop up on Dell/Broadcom combos in the past, you'll want to remove all traces of the driver prior to reinstalling. In all cases, I've had to replace it with the official Broadcom driver for the card to resolve the problem.

As stated in kb937056, follow these steps to resolve the problem:

1. Download and then install the latest version of the network adapter driver on the computer.
2. Click Start, click Run, type regedit, and then click OK.
3. Locate and then delete the following registry subkey: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Network\Config
4. If your server is a domain controller, go to step 5. (This includes servers that are running Windows Small Business Server 2003.) If your server is not a domain controller, delete the following registry subkeys: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Adapters\ {GUID} HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces{GUID}
5. Click Start, click Run, type sysdm.cpl, and then click OK.
6. In the Systems Properties dialog box, click the Hardware tab, and then click Device Manager.
7. In Device Manager, expand Network adapters, right-click the network adapter that you want, and then click Uninstall.
8. Restart the computer.

After the computer restarts, the operating system automatically detects the network adapter. If the network adapter is not detected, you may have to manually reinstall the network adapter drivers.