Alan,

If the 20KT46AUS BIOS is the one that you just installed, it looks like it 
is a valid BIOS for your system.  I found this page on the IBM site that 
provides BIOS updates (as well as older versions) for the NetVista 6792 
computer.

http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-39699

My understanding is that the computer completes the BIOS/POST startup 
sequence, but it fails to see the Floppy Drive so that you can boot off of 
it.  Does it see any other drives, such as a hard drive and/or a CD-ROM?

It's possible that your floppy drive died, coincidentally or that it became 
disconnected, if you were in there swapping out hard drives.  If you have a 
hard drive with a OS installed for this system or even a bootable CD-ROM to 
try, I would see if you can boot from these devices before assuming that you 
have a failed BIOS update.  The fact that you can enter Setup leads me to 
think that the you likely have a properly installed BIOS update.  (If there 
is a setup option for something like Set Defaults or Set Optimal Settings, 
you might try that.  The relatively limited options that most pre-built 
computers offer may not include anything like that.)

Even if you want to reflash your BIOS to a previous version, you'll still 
need to be able to boot the computer off of some drive or another.  (It 
looks like IBM offers BIOS updates in different flavers, including image 
files for burning to a CD and a version that can be run from the operating 
system, as well as the standard bootable floppy update.  I would stick to 
either the Floppy or the CD-ROM version, myself.)

The user guide for this system, on page 61, lists a procedure for recovering 
from a failed BIOS update, if nothing else seems to work.  However, I would 
make sure that a known working floppy can't be recognized in your system 
before I attempted this as a kind of last resort, and again, you still need 
to be able to boot from either your floppy or your CD-ROM in order to 
complete the process.

ftp://ftp.software.ibm.com/pc/pccbbs/netvista/25p4024.pdf

I hope some of this information is useful.  Get back to us with more 
information and any further questions, if this leaves things unaddressed.

John Sproule

---------------Original Message Below---------------------

Date:    Fri, 18 Jan 2008 12:29:51 -0500
From:    alan smith <[log in to unmask]>
Subject: Fwd: bios upgrade ?????

I sent this to the wrong site. I hope that you can help me.

alan smith <[log in to unmask]> wrote:  Date: Thu, 17 Jan 2008 
09:30:32 -0500 (EST)
From: alan smith <[log in to unmask]>
Subject: bios upgrade ?????
To: PCsoft <[log in to unmask]>

  My experimental computer is an IBM desktop  6792MAU, about 5 years old.
  CPU is p4,  1.6Gb, OS  Win2kpro. Bios IBM 20KT46AUS  ( Phoenix IBM 4 )

  I recently saw IBM had an upgrade for their bios, so I installed it!!!!
  When I tried to clean an IDE drive by booting with ERASER, it would not 
boot!
  I went into startup and no floppy ! and I could not enter it.

  I hope that someone can help me reverse that update, because I use the IBM
   for working on odd programs and assorted hard drives, such as erasing, 
formating and partitioning.
  Thank you for the help,  AL SMITH

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