CCR1036- Not Booting

Hello
i’ve got CCR1036 working for around 2.5 months now it have been updated to v6.40, recently on 3.sep.2017 a change from google DNS to OpenDNS is performed in the CCR so the our DNS is the OpenDNS.
on 7.sep.2017 just i made

/system reboot

then the CCR never booted again it stuck on the level of “Starting Kernel”

i tried the NetInstall, but the system is not booted ?? so

what is the issue and how to be solved?

Use the search feature on the top right and you will find several discussions relating to this.

https://forum.mikrotik.com/viewtopic.php?t=116454