United Metrolite Central – Public Bulletin: IdeaPad Gaming 3 15ACH6 TPM

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Firmware Investigation Affecting Lenovo Gaming Systems (Including IdeaPad Gaming 3 15ACH6)

Date: 2025
Issued by: United Metrolite Central (UMC)

Summary

United Metrolite Central is publishing this bulletin to inform users, repair partners, and enterprise clients about an ongoing Lenovo firmware (BIOS/TPM attestation) investigation that includes the IdeaPad Gaming 3 15ACH6 among the affected models.

Juraj_Lenovo published this on date Nov 17, 2025:

Hi everyone,

thank you all for your continued engagement which has been extremely helpful. Some of you may have already come across my earlier messages, but for anyone who hasn’t, I’d like to provide a short summary.

Based on the reports and feedback provided throughout this thread, we’ve collected and forwarded the details about the following models to our colleagues for further investigation:

Legion 5 15ARH05, Legion 5 15ARH05H, Legion 5 17ARH05H, Legion 5P 15ARH05H, Legion 5 15ACH6, Legion 5 Pro 16ACH6, Legion 5 17ACH6, Legion 5 15ACH6A, Legion 5 15ACH6H, Legion 5 17ACH6H, Legion 5 Pro 16ACH6H, Legion 7 16ACHg6, IdeaPad Gaming 3 15ARH05, IdeaPad Gaming 3 15ACH6, Legion T5 26AMR5

For the models Legion 5 15ACH6H, 17ACH6H, Pro 16ACH6H and Legion 7 16ACHg6, we’ve already received a test BIOS version from our colleagues. We’ve distributed this test version to several active forum members who kindly volunteered to try it out. Their initial feedback has been positive, and they’ve confirmed that the test BIOS appears to function as expected and resolves the reported symptom on their systems.

At this stage, we’re still waiting for additional updates from our colleagues. We hope to receive more information, but at the moment we don’t have anything new that we can share. In the meantime, we strongly recommend keeping an eye on the support page for your specific model, as any official BIOS releases or updates will be posted there as soon as they become available.

Thank you again for your patience and cooperation. We’ll keep you updated as soon as we have more to share.

Edit: Added Legion 5 15ACH6A to the list of affected models.

Juraj_Lenovo, a community administrator of Lenovo eServices.

This notice is based on an official statement published in the Lenovo Community forums and reflects the current status as communicated by Lenovo moderators and engineering teams.

Affected Models (as acknowledged by Lenovo)

According to Lenovo Community updates, the following systems have been forwarded internally for further investigation:

  • IdeaPad Gaming 3 15ACH6 ← my laptop

  • IdeaPad Gaming 3 15ARH05

  • Legion 5 15ARH05 / 15ARH05H / 17ARH05H

  • Legion 5 15ACH6 / 15ACH6A / 15ACH6H / 17ACH6 / 17ACH6H

  • Legion 5 Pro 16ACH6 / 16ACH6H

  • Legion 7 16ACHg6

  • Legion T5 26AMR5

This confirms that the IdeaPad Gaming 3 15ACH6 is explicitly included in Lenovo’s internal review and is not an isolated or user-only report.

Current Status

  • Lenovo has already provided test BIOS versions for several Legion models.

  • Volunteer testers reported positive results, indicating that the test BIOS resolves the reported symptom on those systems.

  • As of this bulletin, no public test BIOS or final BIOS release has been issued for the IdeaPad Gaming 3 15ACH6.

  • Lenovo has stated that further updates are pending internal validation.

Guidance for Users

United Metrolite Central recommends the following actions:

  • Monitor the official Lenovo support page for your exact machine type (MTM)

  • Avoid installing BIOS files intended for other models

  • Do not rely on unofficial firmware modifications

  • Expect any fix to arrive via an official Lenovo BIOS update, if applicable

Context and Implications

The IdeaPad Gaming 3 15ACH6 shares platform lineage with several Legion ACH6 models, including AMD firmware components and TPM implementation. This explains its inclusion in the investigation despite its different market positioning.

At this time, there is no announcement of discontinuation, recall, or withdrawal, and no indication that affected systems are unsafe to use. The situation remains under observation.

Source

This bulletin is based on information published by Lenovo moderators in the Lenovo Community forum:
TPM Attestation Failure – Lenovo Legion / IdeaPad Gaming Series

(UMC references the Lenovo Community as the primary source; users should follow Lenovo’s official channels for firmware releases.)

Closing Statement

United Metrolite Central will continue to monitor the situation and will issue follow-up bulletins should Lenovo release a model-specific BIOS update or provide additional guidance affecting the IdeaPad Gaming 3 15ACH6. In the meantime, UMC has suspended the deployment of the affected service fleet, with units remaining retired until Lenovo’s internal engineering teams deliver an official resolution.

Important Clarification: TPM / BIOS Update – IdeaPad Gaming 3 15ACH6

United Metrolite Central (UMC) wishes to clarify the proper procedure regarding TPM firmware resets and BitLocker/disk encryption during BIOS updates on the IdeaPad Gaming 3 15ACH6.

Key Points for Safe Action:

  1. Backup and Suspend

    • If BitLocker or any disk encryption is enabled, suspend BitLocker or decrypt your drives before updating the BIOS.

    • Ensure that your BitLocker recovery key is backed up and accessible.

  2. Timing Matters

    • All recovery preparation must be completed before initiating the BIOS update.

    • “In advance” in some Lenovo instructions caused confusion; this bulletin clarifies it must be done prior to updating.

  3. Consequences of Inaction

    • Failure to follow these steps may result in permanent loss of access to encrypted data.

    • Users should verify backup accessibility before proceeding.

  4. Official Guidance Disclaimer

    • This clarification reflects UMC’s best practice advice based on publicly reported Lenovo documentation and community feedback.

    • Users should still monitor the Lenovo support page for model-specific BIOS updates.

This clarification is issued to prevent unsafe actions and ensure secure firmware updates for the IdeaPad Gaming 3 15ACH6 fleet.

Update on 2026-02-18:
Juraj_Lenovo published a new update follow-up:

Hi all,

thank you for your patience. As mentioned earlier, I would share an update as soon as I received more information from my colleagues and I’m pleased to let you know that I now have additional details to share regarding the progress.

My colleagues have confirmed that the following test BIOS packages have been prepared and are now available:

HHCN38WW - Legion 5 Pro 16ACH6 (82JS), Legion 5 15ACH6 (82JW), Legion 5 17ACH6 (82K0)

HACN47WW - Legion S7 15ACH6 (82K8)

GKCN65WWT - Legion 5 Pro 16ACH6H (82JQ), Legion 7 16ACHg6 (82N6), Legion 5 15ACH6H (82JU), Legion 5 17ACH6H (82JY)

FSCN29WW - Legion 5-15ARH05H (82B1), Legion 5 17ARH05H (82GN), Legion 5P 15ARH05Ha (82GU)

EUCN42WW - Legion 5 15ARH05 (82B5)


Please reach out to our colleagues using the following link, submit your serial number, and request the appropriate package for your system so it can be applied accordingly.

I apologize for not being able to keep up with the influx of private messages to my profile, but I will make sure to follow up with everyone who has already contacted me directly. For further distribution of the packages, please reach out to our colleagues through the link provided above. 

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