Lenovo laptop doesn't go beyond boot screen, can't enter BIOS menu

Question

My Lenovo U510 was originally installed with Windows 8, and I wanted to dual boot Ubuntu alongside it, so I shrunk the existing Windows volumes (there's an SSD and a HDD) slightly in order to make room for the new partition,

In hindsight, I probably should have done this while I wasn't half asleep, as now I don't completely remember everything I was doing. I know I shrunk partitions, installed Ubuntu onto manually created partitions, and then after else who knows what else I did to the poor laptop.

When I boot up the laptop, the Lenovo logo appears for a short while (can't go into BIOS/BootMenu anymore by pressing F2/F12 respectively), then the screen just has a blinking "_" at the top left corner and is unresponsive to any sort of input. Any idea what I can do to fix this? I'm pretty sure a majority of my data is there, as my Windows partition was working fine until I restarted to boot back into Ubuntu and started getting this error.

Is there still anything I can still do with what I have, or should I just get someone else who actually knows what they're doing to help me deal with this huge mess I've made.

Solution

You can also try removing your disk and booting. I would tinker with everything uefi related and try a bios update.