Dragonboard HDMI display not working

I have been using the dragonboard for some time. But today after upgrading and running the following command:
sudo apt-get install curl
curl -sL https://deb.nodesource.com/setup_8.x | sudo bash -

my system was stuck.
so i powered it off and then on again. Since then, there has been no display on my monitor. The LEDs on the board are blinking but there is no display on my monitor when I am connecting the HDMI cable.

Could someone get back to me urgently. I a=have a project submission soon.

Thanks, Rahul

I think your issue could be related to https://bugs.96boards.org/show_bug.cgi?id=744 (if you used apt-get updgrade). Do you have network ? Re-flashing image could be a solution.

You can try to connect your board with ssh by USB-eth or wifi,if can connect it,you can upgrade your system online,else re-flashing image could be a fastest solution.