How do I roll back the BIOS update on Satellite U400-157?

I recently updated a Tempro alert for BIOS update for the note book. I now notice that the screen blanks out a few times at PC start up. It was't there before. How do I roll back the BIOS update to an earlier one.
I don't get to see the BIOS update screen else where other that the time that I did the BIOS update.

Hi
To be honest I dont understand exactly what is your problem.
You said: . I now notice that the screen blanks out a few times at PC start up.
What does this mean exactly? Is your display black until Windows has booted up?
To be honest, I dont think that BIOS update would be the reason for that go to BIOS (press F2) and set the BIOS to default settings (F9) and save the changes (F10).
If you want to get back the earlier BIOS version, then you will need to flash the BIOS ROM module using an DOS based BIOS version. On the Toshiba European driver page you can find only the win-based versions

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