cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
rbergen
Paper Tape
Posts: 3
Registered: ‎07-07-2018
Location: NL
Views: 989
Message 61 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

+1 on this topic, and I should have read this thread before updating to 4KCN43WW. To my disbelief, after the update:

  • about 2 out of 3 times, my Y520 wouldn't complete the BIOS startup cycle and just switch off after a couple of seconds;
  • only half of the 16GB RAM I have installed was reported;
  • when I was actually able to boot, Windows 10 was excruciatingly slow.

The fact that the BIOS defaults the SATA controller mode setting to Intel RST Premium after the update also didn't help, as it made the Windows boot loader unable to find the boot disk. Flashing back to 4KCN40WW (and reversing SATA controller mode to AHCI) fixed these issues.

 

The reason I bought the Y520 is that I was impressed with the performance and stability of the Y510P I got a few years back (and consistently updated), so I was quite disappointed by this. Bad form on the part of Lenovo, in my opinion.

FunPack
Blue Screen Again
Posts: 4
Registered: ‎08-13-2017
Location: SG
Views: 895
Message 62 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

BIOS/UEFI "Restore Defaults" helped me to resolve Windows startup/boot problem.

WTTadmin
Paper Tape
Posts: 1
Registered: ‎08-14-2018
Location: US
Views: 760
Message 63 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Could you send me the original BIOS please.  I'm having the same problems on mine.

rbergen
Paper Tape
Posts: 3
Registered: ‎07-07-2018
Location: NL
Views: 749
Message 64 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

This thread includes links to the various BIOS versions for the Y520: https://forums.lenovo.com/t5/Gaming-Laptops/Legion-Y520-and-Y720-BIOS-update-links/td-p/4087757

 

I flashed back to 4KCN40WW, myself.

 

012512
Punch Card
Posts: 16
Registered: ‎06-26-2018
Location: PH
Views: 694
Message 65 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

4KCN44WW is released.. anyone flashed it?

gryzor
Fanfold Paper
Posts: 28
Registered: ‎12-06-2017
Location: GR
Views: 690
Message 66 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Oh, I missed that! Is there a change log?

rbergen
Paper Tape
Posts: 3
Registered: ‎07-07-2018
Location: NL
Views: 677
Message 67 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Yes, there is a change log, it's available on the BIOS download page: https://pcsupport.lenovo.com/nl/en/products/laptops-and-netbooks/legion-series/legion-y520-15ikbn/do...

 

Based on its contents, I am not going to upgrade straight away; it doesn't mention fixing any of the issues that I ran into with version 43.

AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 670
Message 68 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Updated Information:

Latest Version BIOS fixed all merged issues from previous.

Summary of changes
==================
General Information:

4KCN44WW:
BIOS Notification :
1. Fixed
1) Fix the issue that legacy mode can’t enter setup/boot manager by press F2/F12 when resume from S4 in AC.

2. Add
1) None.

3. Modified
1) Enhancement to address CVE-2018-3639 and CVE-2018-3640;
2) Enhancement to address CVE-2018-3657, CVE-2018-3658, CVE-2018-3659 CVE-2018-3655 CVE2018-3616.

EC Notification :
1. Fixed
1) None.

2. Add
1) None.

3. Modified
1) None.
TNTitan89
Fanfold Paper
Posts: 6
Registered: ‎02-19-2015
Location: US
Views: 552
Message 69 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

I "upgraded" from 40 to 44 today, and that's why I'm here. Windows won't load. On my Y520, there are only two things out of the normal that I can think of. I removed the HDD altogether and just run with the SSD, which has been going fine for months. And I have a problem where Vantage tells me the batter is almost out of power when it fact it's plugged in and at 100%. It used to cause it to go to sleep, but somehow I got that to stop. So now I'm trying to figure out how to get back to 40 since none of the other troubleshooting has helped.

elizat
Serial Port
Posts: 15
Registered: ‎08-21-2017
Location: US
Views: 541
Message 70 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Thank you for the links, but how do you downgrade the bios from a flash drive? We've tried running the exe file from the command prompt after enabling bios flash downgrade in the bios setting.

 

EDIT because I can't figure out how to delete this. We figured it out! Once you insert the flash drive you have to go into advanced settings, then bios settings, then press F9 to reset to default and F10 to save and exit Smiley Happy took us two hours to figure it out but worked like a charm.

Check out current deals!


Shop current deals

Top Kudoed Authors