Dear forum members,
I have a problem with the correct connection of power to the board from the picture. I have a power supply 12 for this V , but I do not know exactly where plus and where minus. I searched in Google, but I did not trace this circuit. The power cords have been accidentally pulled out and I don't want to test because the equipment is old. In addition, it's Christmas and I want to embrace it quickly so that my 90-year-old grandfather would not be left without TV access.
Thank you in advance.
I have a problem with the correct connection of power to the board from the picture. I have a power supply 12 for this V , but I do not know exactly where plus and where minus. I searched in Google, but I did not trace this circuit. The power cords have been accidentally pulled out and I don't want to test because the equipment is old. In addition, it's Christmas and I want to embrace it quickly so that my 90-year-old grandfather would not be left without TV access.

Thank you in advance.