For anyone having trouble getting LibreELEC working on the Lenovo M92p, this setup worked for me:
1. Use the correct image
• Download LibreELEC‑Generic.x86_64.
2. Create the USB installer
• Burn the image using Etcher.
3. Configure the BIOS
• Secure Boot: Disabled
• CSM: Enabled
• Boot Mode: Legacy
• Primary Boot Order:
• #1 USB Key
• #2 SATA 1
4. Boot into the installer
• Save and exit BIOS.
• Reboot and press F12 to open the boot menu.
• Select USB (Legacy).
5. Install LibreELEC
• Proceed with installation.
• System should boot normally afterward.