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AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 7,604
Message 1 of 95

DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

don't get excited whenever an update pop up in front of you ! updates are not always good for us .. take your time and read and see if people are having problems with that update you are going to install ..

I had lots of problems when I updated my Legion Y520 to the 4KCN40WW BIOS and that made my laptop almost useless for a month until all the drivers were updated finally then the machine went back to normal, as it is now

there are lots of people having problems right now with the 4KCN43WW BIOS that came 11 days ago, some are facing lags and performance issues, some can't even boot their laptops and some machines are getting too hot and many other issues as you can clearly see here with lots complaining about this update ..

why you must not get excited for this update ? because it has nothing new and jumping from 4KCN40WW to 4KCN43WW will not make your laptop better ! and here is why :

Summary of changes

==================

General Information:

4KCN43WW:

BIOS Notification :

1. Fixed

        1) Add W/R for S4/S5 hang up issue;

        2) Fix system sometimes hang up before entering SCU.

 

2. Add

        1) None.

 

3. Modified

        1) Update ME to 11.8.50.3460 EC

 

Notification :

1. Fixed

        1) None.

 

2. Add

        1) None.

 

3. Modified

        1) Add W/R for S4/S5 hang up issue.

do not update to 
4KCN43WW unless you have those issues cited in the 4KCN43WW Summary of Changes

pranav_stefan
SCSI Port
Posts: 117
Registered: ‎09-03-2017
Location: IN
Views: 7,506
Message 2 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520


@AM_Y520 wrote:

don't get excited whenever an update pop up in front of you ! updates are not always good for us .. take your time and read and see if people are having problems with that update you are going to install ..

I had lots of problems when I updated my Legion Y520 to the 4KCN40WW BIOS and that made my laptop almost useless for a month until all the drivers were updated finally then the machine went back to normal, as it is now

there are lots of people having problems right now with the 4KCN43WW BIOS that came 11 days ago, some are facing lags and performance issues, some can't even boot their laptops and some machines are getting too hot and many other issues as you can clearly see here with lots complaining about this update ..

why you must not get excited for this update ? because it has nothing new and jumping from 4KCN40WW to 4KCN43WW will not make your laptop better ! and here is why :

Summary of changes

==================

General Information:

4KCN43WW:

BIOS Notification :

1. Fixed

        1) Add W/R for S4/S5 hang up issue;

        2) Fix system sometimes hang up before entering SCU.

 

2. Add

        1) None.

 

3. Modified

        1) Update ME to 11.8.50.3460 EC

 

Notification :

1. Fixed

        1) None.

 

2. Add

        1) None.

 

3. Modified

        1) Add W/R for S4/S5 hang up issue.

do not update to 
4KCN43WW unless you have those issues cited in the 4KCN43WW Summary of Changes


lenovo support for drivers is bad. For now I have save a copy of bios version 40 if you want i can send you. just PM me. My model is Y520 - KBN - R0|IN varient

AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 7,438
Message 3 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

oh thank you man ! my BIOS is still version 40 as well , I didn't update it and I'm just warning the guys here .. because I saw many posts complaining about the 43 version .. thanks a lot for your kindness and care .. I have the file also and if somebody can't find it online we are both ready to send it for them
HAOMIAOYU
Fanfold Paper
Posts: 2
Registered: ‎05-08-2018
Location: US
Views: 7,434
Message 4 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Hello, can you send me 40.Thank you.

AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 7,426
Message 5 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

here it is .. 4KCN40WW BIOS for Legion Y520

 

Admin note: attachment removed - unknown publisher.

B3CKS
802.11n
Posts: 132
Registered: ‎06-02-2017
Location: DE
Views: 7,419
Message 6 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

I  updated to Version 4KCN43WW! And I also updated my guy to MS 1803. i have to say that my guy runs better than before in any game. But yeahh I also found a liitle boot-bug. After two fresh installs of win 10 1803 I change to UEFI/ UEFI first in Bios setting wich fix it for me.

 

I also think that my y520 runs hotter than before. But I don´t have any lags- I have 10fps more in any game!

I Y520ikbn 7300HQ I GTX 1050 Ti 2GB I 16GB RAM I SSD´s I
AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 7,414
Message 7 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

yeah I've read your reply on the other post .. it may worked well for some machines and bad for others .. but it's always better to not update immediately and better to wait for some reviews and tests ..
B3CKS
802.11n
Posts: 132
Registered: ‎06-02-2017
Location: DE
Views: 7,411
Message 8 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

For sure^^.

 

I also don´t see what they have doing in changelogs/ readme!?

 

In the first hand i get no errors anymore with sperctre an meltdown.

But it seems that a lot of more errors are inside the processors. By the way it is a gaming mashine not an business book! I want performance/ speed. 

I Y520ikbn 7300HQ I GTX 1050 Ti 2GB I 16GB RAM I SSD´s I
cz0rt
Punch Card
Posts: 12
Registered: ‎01-30-2018
Location: PL
Views: 7,386
Message 9 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

Legion Y520-15IKBN 

bios from end 2k17.

 

Admin note: attachment removed - unknown publisher

AM_Y520
Broadband 3G
Posts: 442
Registered: ‎01-31-2018
Location: LB
Views: 7,368
Message 10 of 95

Re: DO NOT UPDATE BIOS 4KCN43WW ON LEGION Y520

thanks for the older version @cz0rt, but do anybody need it ? isn't the 40WW good and stable for now ?

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