Well it seems that
flasher-3.0 --enable-usb-host-mode --reboot
only gives the unsupported board(id= 0x0000)
but when I do
flasher-3.0 --enable-usb-host-mode
It says that it is now in usb host mode but I dont get any green texts on my tablet after that. Connecting to computer doesnt show any usb icon and connecting a 5v power injector usb hub thru Y cable doesnt show the usb icon either.
What could be wrong?

Thanks a lot for your help so far.