T43 Bios Downgrade!

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kenny · #1 Post by **kenny** » Mon May 28, 2007 6:33 am

Hi,

Does anyone know if it is possible to downgrade the T43 bios?
I'm currently using version 1.29, but I think that this version is causing problems.

If it is possible to downgrade the bios, can anyone explain how?

Thanks in advance!

monkey243 · #2 Post by **monkey243** » Mon May 28, 2007 7:02 am

I knew you can downgrade the BIOS of T43. But I don't know how.

kenny · #3 Post by **kenny** » Mon May 28, 2007 8:00 am

The old bios versions are available from Lenovo's support site. However I can't downgrade the bios like I upgraded it earlier. When I upgraded, it showed the bios flash tool screen upon reboot. But now, when I try to downgrade with an older version, it skips that part!

gunston · #4 Post by **gunston** » Tue May 29, 2007 8:16 am

what on earth makes you think of downgrading????

monkey243 · #5 Post by **monkey243** » Tue May 29, 2007 11:59 am

gunston wrote:what on earth makes you think of downgrading????

There are many many reasons. Just like get the 2010 error out of your thinkpad while upgrade a third part HDD.

kenny · #6 Post by **kenny** » Tue May 29, 2007 3:30 pm

I suspect that the new BIOS is causing my FAN to run at almost maximum speed constantly, without any reason. After just 5 minutes of use the FAN runs at a noisy 4000RPM, although the maximum temperature stays around 46C*.

I believe this occured after I reinstalled my laptop and updated the BIOS, since there wasn't a problem before I reinstalled the laptop. It ran for about a year, silent as the grave, now it makes more noise than my Desktop PC!

So I'm desperately looking for a way to downgrade the BIOS, just to check and see if it returns to its quiet state!

SpawnyWhippet · #7 Post by **SpawnyWhippet** » Tue Mar 04, 2008 7:08 am

I just went to the BIOS update download page on Lenovo, scrolled to the previous versions of BIOS, downloaded the old one. Ran it, rebooted and all was fine.

http://www-307.ibm.com/pc/support/site. ... MIGR-59379

crashnburn · #8 Post by **crashnburn** » Fri Sep 30, 2011 8:56 am

Do BIOS downgrades via Bootable CD or other method work for Thinkpads?

Esp I am wondering the same for my T61 and X61T.

ajkula66 · #9 Post by **ajkula66** » Fri Sep 30, 2011 10:00 pm

crashburn wrote:

Do BIOS downgrades via Bootable CD or other method work for Thinkpads?

Esp I am wondering the same for my T61 and X61T.

Yes, they work AFAIK.

Why would you want to downgrade BIOS on T61 and X61T, though? Care to share...

crashnburn · #10 Post by **crashnburn** » Sat Oct 01, 2011 2:47 am

This is why..
http://forum.thinkpads.com/viewtopic.ph ... 20#p650520
I was able to downgrade and upgrade with the Bootable CDs.

Lets see what happens next. Know anyone who could help with the German?

#11 Post by **RealBlackStuff** » Sat Oct 01, 2011 5:17 am

All he does is:
make sure there is no Automatic Restart after a crash
and when the QUEUE error happens, he runs a REPAIR installation of XP.

crashnburn · #12 Post by **crashnburn** » Sat Oct 01, 2011 6:49 am

When XP Repair is done what happens? Will it install like a clean registry thereby all applications, drivers and settings need to be reinstalled and will be lost?

The goal is not to repost same thing all over the place. I figured maybe there are some independent issues at work here.

I'll post the relevant details to the right thread.

Here..
http://forum.thinkpads.com/viewtopic.ph ... 47#p650547

T43 Bios Downgrade!

T43 Bios Downgrade!

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