BIOS broken after update

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skollop

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Hey guys,

So I'm a bit messed up right now it seems.

I'm sitting with a Lenovo Y520-15IKBN. Last night I received a message from the Lenovo Utility program that there was a BIOS update ready. Thinking it was to close the recent security holes, I decided to update.
The installer gave a warning that my computer should be fully charged(check), connected to power (check) and with a BIOS set to defeault settings(check).

After the installer finished, it restarted my PC, the Lenovo logo came up as usual, but quickly gave me a blue screen of death, with the message that it couldn't find any bootable devices. It then restarted, booted up on the Lenovo logo, and I left it there overnight to see if it just needed some time (no luck with that).

So now I'm stuck with a PC without a working BIOS I think. I can't enter the BIOS with F2 or DEL, however I can enter the Boot Menu (which shows none of my discs). I tried booting from a USB-stick with windows on it, and funnily enough, my secondary HDD came up. I tried installing on this, but when I booted again, it failed me.

I've tried a few of the standart Windows start-repairs, but none of them works.


Is there a way to install BIOS from a USB-stick, or save it some other way?
I would rather not have to wait until monday to contact Lenovo, then having to send in my PC and wait 3 weeks for them to fix it.

Please respond with any ideas, or if I need to clarify something.

Best regards,
Sune
 

skollop

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Alright so after picking the boot manager as suggested, I was able to set up Windows on my secondary HDD. My SSD does however not show up, neither in Disc Management.

After a restart I succesfully entered BIOS. The BIOS seems to be the correct version (4KCN41WW).

Any suggestions as to how I'm going to have my SSD show up now?
 

skollop

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SkyNetRising

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I don' t see bootloader partition on your 250GB drive.
Without it you couldn't possibly be able ever to boot from that drive.

Currently bootloader is located on 2TB drive. You can add bootloader entry for windows on 250GB drive with following command (from elevated command prompt):
  • bcdboot d:\windows
Next time you boot your pc, you'll be able to choose between windows on SSD and HDD.
But if you later decide to remove 2TB drive from the system, your pc will not boot anymore.

If you want your system to be able to boot from 250GB drive alone, then you have to determine partitioning scheme of the drive first.
Right-click on label "Disk 1" in Disk management, chose properties/volumes and look for Partition style info.
It will be either MBR or GPT.
To create bootloader partition on 250GB drive, you have to:
  • shrink D: partition by 500MB;
    create new partition in unallocated space (primary,active,ntfs for MBR disk; efi system,fat32 for GPT disk);
    assign letter to newly created partition (letter X: for example);
    and recreate bootloader files/settings using bcdboot command
    • bcdboot d:\windows /s x:
    For MBR disk you'd also have to change boot mode from UEFI to legacy/csm in BIOS.
 

skollop

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Hmm that sounds strange. I've always booted from the SSD. Could it have been deleted or somehow othervise gone?

I'll try to look into you small guide there, thanks a lot!

I still wonder though, why can't I see the drives in the BIOS boot order?

 

skollop

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Sure :) https://imgur.com/a/ykznW
Also posted a pic of both drives being GPT and that I've created a new partition (called Boot Files), and that boot files should be created (can't see that on the partition though)
 

skollop

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Ah yeah my bad there!

So I've attached a few screenshots of my procces.
Ignore the part in CMD where I try to assign the letter X. I was doing that for a screenshot for you, and X was already assigned to that partition.

I currently don't know what to do know, as it doesn't seem like I'm able to assign a letter to the partition and move the boot files to the partition.
 

SkyNetRising

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Didn't you see the error there?
Failure when attempting to copy boot files.
Do this:
  • diskpart
    list disk
    select disk 1
    list partition
    select partition 3
    format fs=fat32 quick
    assign letter=x
    exit
    bcdboot d:\windows /s x:
After that disconnect your HDD, change boot mode to UEFI in BIOS and try to boot, when only SSD is present.
 
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