Hi, I have a Powerpack MS71 just like this one:
But the problem is that I can't set It to be on "RockUsb" mode, because I don't know which button I need to hold, since It doesn't have a power button, but a switch.
The only buttons that It has Is a M (menu?), Play/Pause, Prev/Backward, Next/Forward, and a "v" like button.
The first problem on this player was a black screen, but with sounds, now It's not playing any musics (I think It's not the battery because It's not playing even when connected to the working usb port!)
I've tried to do the reset method, because the mp4 uses a Samsung memory, these are the numbers engraved on the memory:
719
K9G8G08U0M
PCB0
csd109p2
And the rockchip number:
RK2608A
I hope you guys can help me solve this problem.