Are you sure you got the right firmware ? The problem you describe happened to me once, somehow the .bin and the .ebn file weren't compatible .. Just download the firmware list on top of this topic:
M6 Firmware 2.003
1- unrar the files , and copy/paste the files on the removable disc icon, or paste in root (where all folders are)
2. Disconnect your meizu, wait a few seconds and turn off your meizu
3. turn on your meizu and wait until it turn itself off again
4. turn your meizu on again .. if you get a message that some files are missing, repeat step 1 to 3