RuntimeError: sensor timeout

hi to all
from some days i got this error after some seconds running a maixpy dock
RuntimeError: Sensor timeout
tried to flash again firmwares and erased spiffs not resolve…
the error comes also with halloworld.py
no more information from putty
any help?
maybe a faulty sensor?
thanks!

ScreenHunter 177|690x293

a new OV2640 is arrived today, and yes, the problem is due to my old faulty sensor! now i can start again to play!
​thanks