Hello i've tried to install a new version of the firmware (first tried SL Version; i've got SP

) But now there is neither a screen nor anything when i plug on the USB cable. The PC doesn't seem to know that the Meizu M6 is Connected.
Nothing happens when i try reset, hard reset etc.
What can i try?
Edit: Now i can turn ist on but it flashes the whole time... i'll try
Edit2: most times nothing happens when pluggin in USB or push power button :eek:. What do i habe to do (reset, hard reset and format just like DFU-Modus doesn't work

, it just flashes very short when pushing on button)