I tried with the battery disconnected, with the power connected and without power, reformatted the flash drive probably 3-4 times. The laptop behaves in all cases the same as the first time, but this time it just refuses to flash.
But when I do everything according to the instructions and just don’t let go of the “fn + r” combination, then it just restarts
Hello! help me with a similar problem on my ideapad gaming 3 i5. I wanted to return the factory bios after unlocked, but after reboot, just a black screen, no backlight.
I tried to flash a dump that was posted by other people on the forum for repair specialists, but it even turned out byte to byte the same as my dump from an already broken laptop.
sorry for using the translator.
UPD.: We managed to solve the problem by searching for a BIOS dump and then flashing it.
@Sweet_Kitten @Lost_N_BIOS …
An emergency call for help from a completely noob , I just joined this beautiful forum , I have IdeaPad Gaming 3 15IMH05 same as sergey … and I don’t know a thing about BIOS dump … but what I need is to unlock my BIOS (to change my S/N) … I have the results20.rar and vars.txt files because I tested it before …
So i will appreciate it if you guys helped me 
.
News :
I have unlocked my BIOS advanced menu … but when I test again it passes (Read Flash) but fails at (Write Flash) , it gives me Error 167 :
So any suggestions ?
Thanks.
EDIT: I linked the guide for reading and learning, not to take guidance from other users HW and bios protected values examples, as its not equal to all.
Lets say, that what a beginner user calls bios/rom, in these days its more called an SPI FIRMWARE system image, so your system as most of all, have protected areas on it that doesnt allow some operations to be done.
And as a beginner that you are…be very careful as this is not common tools/operations risk safe, advanced user experience is a must, and the risk of fail operations is always present.
Thanks for sharing …
What is the EEPROM and is there a relation between it and the SPI firmware ?
(I’m beginner)
In the thread you shared , He said : “Notice that BIOS/UEFI is not locked by the Flash Descriptor and thus OEMs are responsible for implementing BIOS-specific read/write restrictions such as Protected Range Registers and so on. That means that the Flash Descriptor is not responsible for any read/write restrictions set at the BIOS/UEFI region of the SPI chip, so the FD-related methods below will not be of any assistance in such cases.”
and my problem here is the Protected Range Registers and the Flash Descriptor has nothing to do with it as he said , right ?
Correct me if I’m wrong ^^ .
Edit :
Yeah , true …
I think I’ve to go to a technical support center to flash EEPROM (because I don’t have any programming chip + I can’t risk doing it myself).
But I wonder if there a way to change S/N in a low level (without flashing BIOS) where Windows can read it differently ?
Thanks…
@sergeyshibaev228
I have the same laptop with same model , with the same BIOS version EGCN29WW.
the flash command always fails with Error 167 : Protected Range Registers …
So how does it work for you ? Did you flash the EEPROM ? or What did you do ?
Hello, I would like to unlock the advanced bios options of the Laptop Lenovo Gaming 3i 15IMH05, I am using the bios version EGCN39WW.
link bios: https://download.lenovo.com/consumer/mob…cn39ww.exe
Thanks for the help.
can you do mine?
Let me know if you want permanent mod and not a bootable solution.
Hey, I just wanted to see how I can unlock my bios to adjust ram timings, much appreciated!
Take a look HERE: [TOOL] Lenovo (H20) Bios Unlocker and Locker
Btw, stay safe and don’t screw up your dram timing
On Ryzen laptops, ram timings are not changeable. It always ends up in no boot
Model: 15IMH05
bios: egcn33ww
I want to get advanced bios settings for cpu undervolting
extract the 2 files to get my dump file
Desktop.part1.rar (6 MB)
Desktop.part2.rar (4.3 MB)
Dear Mokhtar
Have you tried first switching off laptop. Then pressing and holding these 2 keys simultaneously: "Win" and "R"… while keeping them pressed together, press the "Novo" button on your ideapad… then go to the BIOS option and you should see the advanced options you need…without having to flash 
At least it works on my G580 (20150) with BIOS 5ECN96WWV9.01
I hope you have the same success.
Thank you for your advice, but unfortunately, it doesn’t work.
Hello, I want to undervolt my CPU (GPU also if possible) on my Ideapad 3 but all options are disabled in ThrottleStop and there are no advanced settings in the BIOS. Can someone help, thanks.
Specs:
Lenovo Ideapad Gaming 3 15IMH05
i5 10300H
GTX 1650 Ti 4GB
32GB DDR4 RAM
Bios Version: EGCN41WW
My BIOS dump is here: https://www.mediafire.com/file/wg4jkhzbwk1f919/bios_dump.bin/file
Hello,
I’m requesting a bios mod for Lenovo IdeaPad gaming 3 15IMH05 to unlock Advanced options.
CPU i5 10300H
Nvidia GTX 1650 ti
8GB RAM
Bios Version: EGCN33WW
Bios Download: https://download.lenovo.com/consumer/mob…cn33ww.exe
I don’t know what the dump file is but these are the results of backup tools 22
Thank you.
Edit by Fernando: Thread title shortened