Trying to install elementary OS natively on Dell CB 13, getting errors

I recently purchased a refurbished Dell Chromebook 13. I got SeaBIOS onto it and got a usb drive with Elementary OS flashed on it. When i am trying to install the OS, it gives error saying,

error setting up gfxboot

I googled for the error, previously if you type 'help' and pressed enter, it used to work. Recently this no longer works. How do i get Elementary OS on this machine now. Can someone help with this. Thanks