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Default how to downgrade BIOS - 05-01-2009, 09:21 AM

I want to downgrade my BIOS, but failed both in windows or DOS.
Winphflash reports that "The current system BIOS is the same (or newer) than the version you are trying to flash".
I use "phflash old.rom /x /mode=3 /pn /bbl /force" to flash BIOS in DOS, but it reports the same as Winphflash.
Which command option for phflash I should use? Just "phflash /x /mode=3" is OK? I am unfamilliar with this option, thanks in advance.
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Default Re: how to downgrade BIOS - 05-01-2009, 01:41 PM

Sounds like you are trying to flash the BIOS to the same version already on your BIOS chip therefore you are getting the message...

Under DOS, use phlash16 /x /n /s /mode=3 olderbios.rom and it should work as long as it isn't the same BIOS version already flashed!


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Default Re: how to downgrade BIOS - 05-04-2009, 04:41 AM

Quote:
Originally Posted by somms
Sounds like you are trying to flash the BIOS to the same version already on your BIOS chip therefore you are getting the message...

Under DOS, use phlash16 /x /n /s /mode=3 olderbios.rom and it should work as long as it isn't the same BIOS version already flashed!
I am sure that I am flash an older BIOS. Unfortunately, still failed with your tip :shock:
And I contact with dell support, they told me I can use their tools from dell's website http://support.dell.com/support/downloa ... eid=279821, to flash it under BIOS. But this tool doesn't run it DOS mode... I have no idea about it how to flash it. BTW, my box is mini 12, don't know is there anyone has successfully flash bios?
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Default 08-11-2009, 09:03 PM

First:
download the windows flash version of the bios you wish to downgrade to

once the bios is on the hard drive double click the file (mine was named 910_A04.exe)

When the file starts running, ignore it and open windows explorer

The file will run in the background and eventually reach the "you can't downgrade" error. You want this to happen so that it stops the winPhlash in progress and stops the failed "downgrade" from deleting the temp files

DO NOT click "ok" or whatever it says on the error popup. IGNORE IT (for now)

In windows explorer navigate to /windows/temp/winphlash

Here you want to do a [ctrl] + A to select all of the files

Copy all of the files to a new location. I used C:\Bios

Paste all of the files into C:\Bios. Make sure that all of the files copied successfully, then you can finally click "ok" on the error from earlier.

After the error disappears and WinPhlash closes out, go back to explorer

Open the file: C:\Bios\PHLASH.INI with notepad

inside the file, you want to look for the lines that say:
Advanced=
UpdateMode=

Change the value from 0 to 1

Save your changes

You should now be able to run the flash interactively

Run the file WinPhlash.exe (as an administrator)

Once the WinPhlash is running, select the button labeled
"Advanced Settings"

on the tab labeled "Flags" uncheck the box next to:
Flash only if Bios Version is newer than system

Click "ok" to close the advanced settings box

You should now be able to "downgrade" to the bios version listed in the folder by clicking the "Flash BIOS" button
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Default 08-12-2009, 01:23 AM

Read Dell I910 Mini/Vostro A90 USB Key Drive flashBIOS Utility - create the USB key and boot from it. Select the "Legacy" option: you'll then get a choice of all older released BIOS versions.


Steve
Mini 9|2GB RAM|64GB RunCore|Intel 5300|Windows 8.1
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Thumbs up 02-10-2013, 03:41 PM

Good tip.

Downgrading the bios didn't solve my problem (trying to use a goingpower battery on my wife's mini 9), but wanted to thank for this guide anyway.

Quote:
Originally Posted by racer25x View Post
First:
download the windows flash version of the bios you wish to downgrade to

once the bios is on the hard drive double click the file (mine was named 910_A04.exe)

When the file starts running, ignore it and open windows explorer

The file will run in the background and eventually reach the "you can't downgrade" error. You want this to happen so that it stops the winPhlash in progress and stops the failed "downgrade" from deleting the temp files

DO NOT click "ok" or whatever it says on the error popup. IGNORE IT (for now)

In windows explorer navigate to /windows/temp/winphlash

Here you want to do a [ctrl] + A to select all of the files

Copy all of the files to a new location. I used C:\Bios

Paste all of the files into C:\Bios. Make sure that all of the files copied successfully, then you can finally click "ok" on the error from earlier.

After the error disappears and WinPhlash closes out, go back to explorer

Open the file: C:\Bios\PHLASH.INI with notepad

inside the file, you want to look for the lines that say:
Advanced=
UpdateMode=

Change the value from 0 to 1

Save your changes

You should now be able to run the flash interactively

Run the file WinPhlash.exe (as an administrator)

Once the WinPhlash is running, select the button labeled
"Advanced Settings"

on the tab labeled "Flags" uncheck the box next to:
Flash only if Bios Version is newer than system

Click "ok" to close the advanced settings box

You should now be able to "downgrade" to the bios version listed in the folder by clicking the "Flash BIOS" button
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Default 09-07-2013, 08:11 PM

Props to Somms...
(and Holmes4 for the link)
Many thanks Somms, the thread with your linked utility (above) is locked/closed and I can't thank you there' so I will thank you in this post. I searched and tried many things, your utility was simple and a cake walk. I am now running A04 so I can get my replacement battery. I was going to try a new version, but others had problems I think i read (need to read more) and was looking for A07 but our utility does not have it. Anyone know where the 910_A07.ROM file may be anywhere?
Once again, many thanks!

Last edited by burkhardi; 09-14-2013 at 07:47 PM.
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