In current design, the LAN chip still need to keep the power on even the RJ45 cable not plug-in. Although the LAN chip able to enter the D3 low power mode to save the system power but still with power consumption loading. This invention is to add the detect function at the LAN connector to turn on or turn off the LAN chip power
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INC, HP, "NEW METHOD FOR NOTEBOOK POWER SAVING BY RJ45 CABLE DETECTION", Technical Disclosure Commons, (October 05, 2018)