clevo [Request] Clevo NH50_70RC (InsydeH2O) - Unlocking Advanced Menus & NVRAM Cleanup to Resolve Firmware Deadlock

[HISATO]

Hello experts,

 

I am experiencing a severe Firmware Deadlock on my Clevo NH50_70RC (rebranded as Casper Excalibur G770). After an installation attempt of CachyOS (Arch-based), the system has become stuck in a boot hang state.

 

The Issue:

 

Logo Hang: When any drive (SSD/HDD) containing Linux partitions is connected, the system hangs indefinitely at the manufacturer logo. I cannot access BIOS (F2) or the Boot Menu (F7) in this state.

 

The Cause: It appears the InsydeH2O firmware is panicking while parsing the UEFI boot entries or the GPT partition table of the Linux drives.

 

Current State: I can only boot into a USB installer if I physically remove all internal drives. However, hot-swapping them back in once the OS is loaded does not trigger a rescan at the controller level, leaving the drives invisible and preventing any wipe/recovery attempts.

 

Technical Assets & Verified Specs:

 

I have obtained a Full 16MB SPI Dump and verified the following specs from the BIOS Main menu:

 

Chassis / Project Name: Clevo NH50_70RC

 

BIOS Version: 1.07.03 (Insyde Corp. 5.23.04)

 

KBC/EC Version: 1.07.03

 

ME FW Version: 12.0.38.1430

 

Processor: Intel Core i7-9750H

 

Secure Boot Status: Currently Disabled

 

Dump Details: Includes Flash Descriptor, Intel ME region ($FPT at 0x2000), and the BIOS region with $VSS signatures.

 

My Request:

 

Unlock Advanced/Chipset Menus: I need access to the hidden “Advanced” and “Power” tabs to modify SATA/VMD modes and potentially bypass this boot hang.

 

NVRAM Cleanup: I suspect the NVRAM ($VSS region) is cluttered with invalid boot entries causing the EFI parser to hang. I need the NVRAM region in this dump to be cleaned or reset to factory defaults.

 

SPI Dump Link: SPI Dump (Google Drive)

 

VirusTotal Scan: VirusTotal Scan

 

 

I have the means to flash this back if I can get the system stable or via an external programmer if necessary. Any help from the BIOS modding community would be greatly appreciated.

 

Although this is a modding request for unlocking and NVRAM cleaning, the ultimate goal is to resolve a storage-induced firmware hang that prevents any drive recovery on this machine.

 

Best regards,

 

HISATO