XinYiLian can't connect to wifi

The set-top box of XinYiTong suddenly can't connect to the TV, the possible reasons: 1, the network cable plug connected to the set-top box is loose or fall off. Solution: reconnect the network cable to restore the signal. 2, set up a wireless network router was closed or did not turn on the wireless. Solution: Turn on the wireless router and other devices to detect the wireless signal is normal. 3, the network set-top box input TV video source and the current TV signal source is not consistent. Solution: Adjust the TV signal source to make the set-top box video source consistent with the TV signal source.