r/LenovoLegion

I have been reverse-engineering the InsydeH2O firmware used by the Lenovo IdeaPad Gaming 3 15ARH05 (82EY / IP3GAMING-15ARH).

The project started because this model exposes only a very limited BIOS interface, while common unlock sequences such as Fn+R+N do not appear to work reliably on this generation.

So far, I have:

• extracted Lenovo’s official FCCN21WW Windows update package;
• recovered the complete 16 MiB update ROM;
• parsed its AMD PSP directory;
• decompressed and executed the x86 reset-stage image;
• traced its reset loop under QEMU;
• extracted the Setup Utility and reconstructed its IFR;
• confirmed the existence of a separate hidden Advanced form set;
• recovered its GUID, variable stores, offsets and option inventory;
• tested an experimental SREP runtime patch without permanently modifying the firmware.

The hidden menu contains controls for:

• PCIe GPP and power policies;
• SATA/AHCI and RAID configuration;
• TPM and fTPM;
• USB controllers and individual ports;
• ACPI features;
• SVM, SVM Lock and SMM Code Lock;
• DASH and AMD remote KVM;
• Above 4 GB MMIO.

One particularly interesting result is that the Advanced form set is not surrounded by a top-level IFR SuppressIf condition. My current hypothesis is that Lenovo/Insyde hides it through a visibility table or registration logic inside H2OFormBrowserDxe, rather than through a simple “unlock” setup variable.

I also recovered this form-set GUID:

C6D4769E-7F48-4D2A-98E9-87ADCCF35CCC

However, the runtime SREP patch has not exposed the menu yet. The laptop currently runs FCCN19WW, while the analyzed update is FCCN21WW, so differences in modules, patterns or variable semantics may explain the failure.

The repository documents the full process, hashes, extraction commands, QEMU findings, IFR inventory, experimental SREP configuration and suggested next steps:

https://github.com/root-hunter/lenovo_bios

Update: the hidden Advanced BIOS menu has now been successfully unlocked on the test machine using SREP. This is a runtime unlock and does not require flashing a modified BIOS image.

The method remains experimental and model/firmware-specific. Hidden settings can still cause a brick, boot failure or no-display condition, so do not change unfamiliar options without a verified SPI backup and recovery plan.

I would especially appreciate help from anyone who:

• owns the same 15ARH05 / 82EY model and can reproduce the unlock;
• can test it on other FCCN firmware versions;
• has experience with InsydeH2O, SREP or H2OFormBrowserDxe;
• can help validate and document the exposed settings safely.

Issues, corrections and reproducible test results are welcome.

Yesterday bought this beautiful i7 glacier white with RTX5070, i9 and 32gb RAM; wonderful piece of tech.

Before that, I had an old MSI GP72 with RTX970 and a Mac Pro M1 given to me at work. So it feels like a huge upgrade and first off i downloaded RDR2 to play it for the first time :)

I know it seems like a stupid question, but I just don’t wanna break it lmao.

Whenever I try to push it down with my finger I need so much force it seems like it’s about to break and I just give up. Same story whenever I try pushing it with the ethernet connector itself.

I keep seeing mixed comments EVEYRWHERE, including google, reddit, and AIs, saying it’s right to push it down with your finger and wrong to do it with the connector AND vice versa. I don’t know what to believe anymore so I am making this post.

The port being extremely strong is also a bit confusing, given that my dad’s Lenovo Thinkpad also has an ethernet port that looks the exact same, but goes up and down easily without any sort of force whatsoever.

Thanks!

Lenovo Legion Pro 7i ❤️

I bought my Lenovo Legion 5 about 6 months ago and I've been using it a lot but the LCD display is a nightmare for dark environments and I'm thinking of changing it to OLED by changing the panel (obviously) and the top lit too because the OLED and LCD version have different top lids and idk if it's plug and play or not as OLED probably uses a different kind of connector or something which will probably make it harder for me to change

I learned my lesson.... when your kitten destroys an OEM cable, don't buy a £50 offbrand replacement from amazon. It only took a month for it to burn my hand and render my laptop unchargeable even with a brand new OEM one from Lenovo. Hoping this is fixable :((

Model is 15IMH05H

I have a Lenovo Legion 5 Pro with an RTX 4070 and I'm planning to swap the stock display for a 16-inch 2560×1600 240Hz OLED panel.

The OLED panel itself supports G-SYNC, but from what I understand, simply installing it in the Legion may not make the G-SYNC option appear in NVIDIA Control Panel.

The panel model I have is the NE160QDM-NM7 / BOE0C24, using a 40-pin eDP connection.

What I'm trying to figure out is: is there any way to make the Legion recognize the G-SYNC capability of the replacement OLED panel?

Would this require something like:

• Changing or modifying the panel EDID
• Using CRU
• Running the laptop in dGPU-only mode
• Modifying the BIOS
• Using a different NVIDIA driver
• Copying G-SYNC-related EDID information from the laptop the OLED panel originally came from

Since both my Legion and the replacement OLED panel are capable of G-SYNC, I'm wondering what actually prevents G-SYNC from working after the panel swap and whether anyone has found a workaround.

Has anyone successfully gotten G-SYNC working after installing a different G-SYNC-capable internal panel in a Legion?

i had noticed conservation mode was off after a reset for some reason, and felt like sharing.

i use it daily for studies, production, and gaming. leaving it plugged in with conservation mode on practically 100% of the time.

anybody care to share theirs? i want to know if it really is "good" for ≈1 year like it says, bit too vague for me yaknow?

Got my first laptop and i got a monitor and a couple other things for a decent setup.

My legion 5 2020 (15IMH05H) doesn't turn on at all. There is no display at all it tries to boot, but then after a few seconds, the fans ramp up, and then it shuts off. Sometimes I can hear the windows boot sound but still no display. Yesterday it worked like normal too and a few weeks ago it randomly shut off ~30s after boot but turning off hybrid gpu mode in the BIOS fixed it. My legion has 8gb of ram 1660ti and 10300H Oh yeah I already tried nova button and stuff and right before crashing changing the performance using FN + Q works

i'm using a lenovo legion 5i pro 2021 model and i noticed that there's a hairline crack between the hinge and keyboard. what could be the cause? will it worsen? anyone with the same experience? i'm worried