Hello everyone, I am trying to install Armbian on my Android TV Box, but unfortunately, I flashed an incorrect firmware. Now the device is hard-bricked: the red and blue LEDs are blinking alternately, there is no HDMI output (black screen), and the physical reset button is not working properly. I already have an SD card loaded with the multitool to install Armbian, but I need to force the SoC into Maskrom Mode first so it can bypass the corrupted eMMC and boot from the SD card. Device Specifications: SoC: Rockchip RK3228A Board ID: T39-V1.0 Storage: eMMC (BGA type) I have attached the front and back photos of my PCB board (IMG-20260607-WA0027.jpg and IMG-20260607-WA0031.jpg) for reference. Could anyone help me identify the exact and safe test points (CLK to GND shorting points) for this specific T39-V1.0 board layout? Thank you so much for your help!

just for reference: the velvet-os image mentioned above is using some old mainline u-boot with patches from warpme minimyth2 from that time - here is how it was built: https://github.com/hexdump0815/u-boot-misc/blob/230127-01/readme.h616 ... the default u-boot of this image is the tx6s one best wishes - hexdump