Originally Posted by laziod
No no output.
If you have no output on your tv at all (no picture at all), then you will have to create recovery sdcard. To do that, you will need linux machine.
Here is tutorial:
Arm/Boot Loader/How to burn a uboot to board - Amlogic
Do everything it says here except use bootloader file you got with your firmware (your file: u-boot-aml-ucl.bin instead of u-boot-aml.bin)
If you have picture on your tv (scrambled), see my post here:
Android TV Box 4.0 ARM Cortex A9 WiFi unstable