A6L chinesse TV Wifi phone does not get TV signal

I need help. I ordered A6L TV Wifi phone and the tv does not get signal. The Radio does not work either. It cost more money to send them back and we are technicials and we can fix it if someone has a electrical diagram. So that we can connect the antenna. The antenna show red and without signal, and when we take off the antenna i shows the same thing. We think that it is a problem with the motherboard.

Try this:

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Good Luck.

PD: As you know this is an Spanish forum. Try in spanish, do the effort.