Ubuntu 17.04 stuck on grub window while booting

I have 17.04 server. And windows also.

I installed bootrepair and clicked to do a repair. I then restarted and now there is no way to go to OS select screen. It is stuck on the grub terminal.

How can i fix this?

I just wanted to install locales because it was giving this error

Error: package has no installation candidate

I did everything to fix that locales but I could not so I repaired to see if it would work but instead I broke it :(

i dont have usb now. Is there any chance to do without it?