(After the user's PC network card is connected to the Modem through a network cable, its indicator light will flash; if the indicator light does not flash normally, it means that there is a problem with the network cable between the network card and the Modem or the user's network card is faulty (the network card problem needs to be connected to the computer dealer). Confirm whether the computer network card, Modem and network cable are connected normally, try plugging and unplugging the crystal head)
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