Dell introduced downgrade protection in later revisions. If you are on Rev A40 or higher, flashing back to A34 may be blocked. However, there is a workaround:
Not for use with older Inspiron 3000 series prior to 2019 or ARM‑based Dell systems. Dell Portable Bios And Diags Rev A34
Verdict: SupportAssist is better for daily health monitoring. Dell introduced downgrade protection in later revisions
The utility is typically distributed as a bootable ISO image or a Windows/DOS executable . Dell Portable Bios And Diags Rev A34
: The BIOS maintains detailed logs of diagnostic results, thermal events, and power-on self-test (POST) failures. Universal Installer : The executable (e.g., I5150A34.exe