Debricking

If something went wrong you have (at least) two options to debrinck your device

Option 1 (working U-BOOT)

1. On pendrive put file usb_upgrade_app.bin (working upgrade file for your device)
2. Insert pendrivie into STB and power up
3. Enter uboot menu
4. Enter following commands:

setenv usb_upgrade 1
setenv usb_upgrade_path usb_upgrade_app.bin
saveenv
reset

After reseting the device should start firmware upgrade.

Option 2 (U-BOOT not working)

What you need:

1. Working flash dump
2. SPI Programmer

You can program SPI Flash memory without desoldering it from PCB using test pins on bottom layer of PCB

SPI Pins