I can only guide you with what I experienced first hand. ***NOTE - your experience and results maybe very similar to mine or very different. Even their bootable CD would not allow flashing to older versions.
No option to manually override and flash it. If you downloaded it and tried to flash it, it would fail and give you an error message about it being older than the current BIOS and would terminate the process. I mean, how hard could it be for Toshiba techs to post a link to a simple bootable BIOS flashing tool to let you flash older firmware?!!!!Īnyway, the utility downloaded and installed BIOS v6.30. All I could see were forum users helping other users and a lot of angry customers. A - the Toshiba Support download section of their website is a freaking mess! B - Toshiba support and forum moderators were basically ignoring this issue. From my research, it is clear to see two more problems. What actually happened is that the software was wrong and would download and install the wrong BIOS, which would then, of course, make your machine act screwy! In this case, it downloaded BIOS made for mostly for the C855 series and a very select C875 model, but NOT for the C875D that he had!Īccording to the forums, this utility was defective and many others suffered the same problem. A Toshiba laptop utility was recommending that the latest BIOS be downloaded and installed.
My cousin accidentally upgraded his BIOS with the wrong BIOS for his laptop. It might be as simple using Flas**t under DOS but I was afraid it would brick. I Googled, searched, read and posted requests for help and received none (yeah, even here). There is/are probably other easier ways to do this. It worked on every current Toshiba laptop that we tried. My friend works there and we did this after hours. After discovering this method through hours of trial and error, I tried this process on some Toshiba Satellite display models at a major retail store. Specifically this deals with a Toshiba Satellite C875D-S7105 laptop and INSYDEH2O BIOS but this method should work for similar circumstances and machines using the same BIOS but I make no promises. This is a simple step by step guide of a method to revert to an older version of InsydeH2O BIOS. HOW TO REGRESS or DOWNGRADE to older INSYDE BIOS
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