I manage to install and update LE for my old rk3188 tv box. its booting and i get a picture but after a while the screen goes black but the tv gets a singal (I dont get the message no signal) and i can see that the resolution is 1092x1080. Even when the screen is black I still have access via ssh. I tried to change some settings in the extlinux.conf in the video=HDMI-A-1:e with no luck. Any help for me?