250gb expansion card dual-boot display won't show

I dual boot windows on the main ssd and use linux mint on the expansion card. I was just using my laptop and suddenly my mint crashed and now whenever I try to boot with the expansion card in it just displays a black screen and wont let me go into bios I dont know what to do.

A boot drive should not stop you from entering the BIOS - the BIOS option should kick in before all boot drives. Can you not press F2 in the machine’s boot-up phase?

For the avoidance of doubt, your title refers to a bootable systems screen. This may be a question of semantics, but your BIOS and a bootable systems screen are two different things. That said, the FW BIOS does seem to have a bootable drives menu. I think you have to hit F1 for this.

If you shut the machine down and then remove the expansion card, does the main SSD boot?

I definetly shouldve added more detail. I can go into my main ssd if I take out the expansion card, but whenever I try to turn on the laptop with it in it just black screens with the keyboard being unresponsive. Also, if I try to plug it in after going into my main sdd it doesnt show the storage at all.

Edit: I can also make a video later explaining what I mean its just late for me right now

Another thing to add is that if a bootable drive offers a boot menu, this is normally not the boot menu offered by the BIOS. It will usually have its own e.g. GRUB.

Thus, strictly speaking, I think you should find that your BIOS’s bootable drives menu will still work, even if your bootable drive’s boot menu does not. So I would do two things, with your expansion card in place:

  1. find out how to get into the system’s boot menu (I believe this is F1 tapped at the right time in the boot phase)
  2. check that your expansion card has a higher boot priority than the internal NVMe drive

If the drive is plugged in late, Windows may not see it as a valid drive because it will be formatted with a Linux drive format e.g. ext4. However Windows should see the hardware for it, e.g. in a Disks settings dialogue box.

Yes please. :sports_medal: