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Most of HD channel broadcast in 5.1 channel sound. Regular channel broadcast in 2.0 channel sound. You TV only have 2 speakers so you will expect the sound will be low compare with the regular channel.
Resetting the TV If the buttons on the
remote AND the buttons on the TV case do not work (channels do not
change and you cannot open or navigate the menu), the TV has stopped
responding. Reset the TV as follows:
TVs have a reset button. If available and accessible, try using the
reset buttons before using the steps below. Using the reset buttons can
1.Unplug the TV power cord from the power outlet. 2.Unplug any connected devices (DVD, Set-top boxes, etc...) 3.Press and hold the TV power button for five seconds. 4.Plug the TV power cord back into the power outlet and turn on the TV. 5.Open the on-screen menu to confirm that the TV is responding again. 6.Turn off the TV and reconnect the devices. 7.Turn on the TV.