Hi, been using this laptop for about 2 years now and the laptop was working fine untill the BIOS update from 6th February (version H3CN46WW) (installed via Lenovo Vantage), the battery started acting wierd. Considering I use my laptop plugged in about 97% of the time, the laptop remains at 100% battery all the time, but after the BIOS update, when the laptop is used on battery, the laptop runs fine for a while (1-2 minutes) and then it suddenly shows the low battery message and shuts off immediately. The laptop then refuses to turn on and the power button just flashes 3 times. After plugging the charger, the battery doesnt charge above 0% but unplugging and plugging again makes the battery shoot to a 100 instantly and then the battery drains normally. After a few days the laptop just completely gave up on charging as the charge was just stuck at 0 and refused to charge at all even after using the previous method that I used to charge. I had my suspicions about the BIOS and knew that the battery itself was fine (checked battery health using multiple tests), so I tried re-flashing the current BIOS and somehow that fixed it.. for a while.

The laptop is now the doing the same thing and again I tried re-flashing the BIOS but that didn't do it this time. Therefore, I wanna downgrade the BIOS version since I'm not sure when the next version will come out and this problem is seriously hindering my ability to use the laptop without the charger. Can anyone provide me an older version of the BIOS for my model? It seems there is some bug in the current BIOS (version H3CN46WW) that prevents my laptop from functioning optimally.

Thanks

MAJOR UPDATE:

Finally found a fix that has lasted for about a week and will continue to be so ..

Apparently my suspicions were correct and it was a BIOS problem .. after having re-flashing the same BIOS version, the battery started working normally for 2 days and started showing the same problems again after .. then after a long wait .. a very helpful redditor (Thank You u/Sensitive-Guard2599 !) found me an official link to the older BIOS version straight from Lenovo .. after waiting for the battery to get charged up after a long while .. I downgraded the BIOS and voila ! It now is working normally and is stable so far (fingers crossed) . Having downgraded from H3CN46WW to H3CN45WW fixed the problem for me !

If anyone requires the direct link to this specific BIOS version (It isn't directly accessible via Lenovo) .. let me know via PM .. I'll either respond directly or add the link to this post itself.

LATEST UPDATE REGARDING THIS ISSUE:

Since the last update to this post, I created another post which I have been more active on. Whoever needs the BIOS and more details (spoiler alert, the fix didn't last), can check that post out, here's the link: https://www.reddit.com/r/Lenovo/s/ZdKH8hsyj3

As tittle says i want to update My Lenovo 15ACH6 BIOS to the latest one, but Lenovo page state it is for Windows 10 ( My laptop came with Windows 11 by default) although when reading BIOS update readme text it reads applicable OS win11 so i'm really confused about it. I want to update because ive had some weird blue screens from time to time most of them just after turning the laptop on and trying to open something it is weird. I do appreciate any help.

LENOVO IDEAPAD GAMING 3 15ACH6 BIOS FIX SOLUTIONS:

if you updated this model to the July BIOS update, which bricks your laptop, then you came to the right place.

Sorry if my english is broken, I found a repair; i did it myself, even if my laptop is still in warranty lol. if your bios is bricked:

WARNING: THIS IS FOR IDEAPAD GAMING 3 15ACH6 ONLY!!

So i assume your laptop is now in black screen yeah? the keyboard light is on and even if you press caps lock, nothing happens, only turning off keyboard lights on and off works.
so here's the solution:
1: power off your computer and unplug the charger
2: download these files that i upload from google drive:
https://drive.google.com/drive/folders/1D5C8uHLPyN3WgxdnmmlqqRjVj3NPl_Yf?usp=sharing
3: grab a pendrive, format it to FAT32, put the downloaded files in the pendrive (find a working computer)
4: Plug the pendrive into the bricked laptop (Make sure the laptop is turned off)
5: Now this is the crucial step: hold (fn + r), plug the charger and turn the laptop on ( MAKE SURE YOU STILL HOLDING THE FN+R ), you will notice the power button is not lit, but the keyboards are, if you hear the fans kicking high and constant loud beeps then it means the recovery process starts (if not, try again). Release the FN+ R if you hear that. Don't freak out about the beeps and the fans going high, and do not power off or touch anything, the recovery process might take longer than expected. After the recovery process finished, your laptop will automatically shut down and reboots. if not, power on it manually. Your laptop will boot normally again.

Now for the explanation how these works:

As you can see, the specific motherboard name for this model ideapad gaming 15ACH6 is GOG20, how did i find it? I just searched the replacement parts of the motherboard and it says GOG20, so i went and dig up the lenovo website of the old bios ( the version that in the google drive is H3CN30WW i think, then i extracted the bios and found the .ROM file, renamed it to GOG20, GOG20A, or GOG20B (i made duplicates as you can see to try different combinations of correct ROM file name that the BIOS Recovery can read) , i dont know which one is correct, but as soon as i hear fans kicking out loud and beeps, i think it means the laptop recognizes one of the correct files in the pendrive, and yeah my laptop boots normally. Don't worry about downloading all of those combinations that i uploaded, just put all in the pendrive and do the steps, eventually the laptop will recognize the correct one and start the process.

One week later, i realized that lenovo pulled out the latest BIOS update from their website (July i think?), as i saw from the website today the latest one is H3CN32WW which released on March 16 2022. Maybe they thought the July BIOS isn't working. As far as i know, The march bios is the one that works, safe and latest for now. You can download that if you want to update.

Hello, I have discovered that my IdeaPad Gaming 3-15ACH6 laptop has a bios version (H3CN31WW) and have decided to upgrade to the latest version (H3CN47WW). I succeeded, but the performance in games dropped. How can I solve this? Is it possible to return the old version?

Lenovo has been notorious of not allowing users to access advance bios settings, but recently I have found a way to access this options in the bios menu. I have only tested this on Lenovo Ideapad gaming 3 15ACH6. Steps are as follow:Step 1: Turn off you laptop completelyStep 2 : Press the power button to turn onStep 3 : Spam F2 to enter BIOS menuStep 4 : After entering BIOS, DO NOT PRESS ANYTHING EXCEPT THE FOLLOWING KEYS : Press Fn+R+N for 3 times.Step 5 : Press F10, then enter to save and exitStep 6 : Spam F2 again until you are in BIOSStep 7 : You should now see some hidden options, Enjoy!

WARNING: By doing this, you *may* void your warranty or damage your hardware. Make sure you know what you are doing before changing anything within the BIOS. I soft bricked my laptop twice when messing with the options. I am not responsible for any damage cause by accessing the advance optionsPersonally I only changes the cpu power profile to the 54W profile, along with the use of AATU(aka UXTU) I managed to increase the performance by quite a bit. CinebenchR23 score before tweaking was 8906, but after tweaking the score increased to 11233 while maintaining <95℃. There are options for RAM speed but I didnt use those because I am not familiar with them. I really dont understand why Lenovo have to limit this laptop so much and not give us any easy option to boost the performance, there are plenty of thermal headroom in this machine. And total power isnt a problem as the cpu can run at 50W with gpu at 90W for over 10 minutes without any problem(no throttling no thermal problem). Lenovo why?Credit : I saw this method from https://youtu.be/mmd4Sc5bVcIAATU/UXTU : https://github.com/JamesCJ60/Universal-x86-Tuning-Utility

Hi, I've bought an Ideapad gaming 3 that had windows 11 preinstalled, after entering the bios to check some things because I have battery drain while playing certain games, I saw that the version actually installed is H3CN31WW (V2.01). On the Lenovo site there is what I suppose is a newer version of the bios H3CN32WW (V2.02) but it says that it's for win 10. So my question is: should I try upgrading the bios or wait for a win 11 version?