Not able to boot Ubuntu desktop

Question

I have been using Ubuntu Desktop for a while now, but today for some reason I am not able to start it. Here is what I see.

I have tried rebooting and starting it in recovery mode. but seems to be of no help. I am downloading fresh copy of Ubuntu so that I can play around with steps mentioned here - Target filesystem doesn't have requested /sbin/init

Here is what I have tried.

I booted Ubuntu from USB

Saw 4 options : 1. Try Ubuntu without installing 2. Install Ubuntu 3. OEM Install 4. Check disc for defects

I went to first option. Opened terminal --> sudo fdisk -l

This gave me my actual device name --> /dev/sda1

Then I executed --> sudo fsck /dev/sda1

Rebooted again from Hard disk. Same issue persist. Anything I am missing?

Will keep this thread updated. Meanwhile, suggestions are welcome.