[Rupa X88 Pro 13 - RK3528 board with images]

I finally managed to boot in Maskrom mode by shorting the clock pin (red circle on the picture) to ground, then loading the loader (rk3528_spl_loader_v1.07.104.bin) and u-boot with rkdeveloptool. 

[Rupa X88 Pro 13 - RK3528 board with images]

@shexplorer I am in the same situation with my x88pro13 box not booting and I do not manage to go in Maskrom mode. Any progress on your side ?

[Rupa X88 Pro 13 - RK3528 board with images]

Thanks for sharing your updates, any idea about the function of the 8 pin holes close the lcd display?