The TV signal works only at 720p 60 Hz and 1080p 60 Hz.
Try it on the Mecool BB2 DDR3 2 / 16GB TV box and TV SONY KDL-40S5600 with RGB 8 bit panel.
There's a loss of picture sharpness on the TV about 10-15 percent.
Looking closely at the pixels of the TV, you can see the pixel balance (caused by the transition from the digital signal to the analog signal of the first adapter and then the transition of the analog signal to the digital signal of the second adapter). However, the picture is quite decent for the ordinary viewer.
If a purple / green screen appears when you start the TV box, restart the TV box - then the purple / green screen no longer appears during the entire running of the TV box.
Good luck