Lenovo no longer uses floppy diskettes (version 1.76 would be from the late 1990s/early 2000s). Instead, they provide:
Even with an "extra quality" diskette, you may encounter problems. Lenovo no longer uses floppy diskettes (version 1
While this tool is essential for collectors, it comes with a massive warning label: Do not use it unless you know exactly what you are doing. If you receive a "Disk I/O Error" or "Non-System Disk":
The HMD has the ability to write to the EEPROM (Electrically Erasable Programmable Read-Only Memory). If you interrupt a write process, or if you select the wrong model number configuration, you can permanently "brick" the motherboard. Unlike modern UEFI BIOS updates, there is often no automatic recovery mode on these older machines. Lenovo no longer uses floppy diskettes (version 1
If you truly need a diskette-based tool (e.g., 380, 600, 770 series):
If you receive a "Disk I/O Error" or "Non-System Disk":