Date: Thu, 23 Feb 2006 16:51:28 -0500 From: "James He" icrazy@gmail.com Subject: [OT] Cannot save BIOS settings To: fedora-list@redhat.com Message-ID: fd0f51b90602231351h361b635cx4da7fce0941a8534@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1
Hi, all!
This might be off-topic, but since we are running FC on this machine, so maybe you can help.
I replaced a bad motherboard with a new one for one computer and the computer started to be working again. The only problem now is that I am not able to save the BIOS(Phoenix) setting on that computer, that is to say, the default setting will always come back automatically. This is not acceptable, for we need to boot the computer from network, but the default booting sequence prefers to boot from hard disk, on which we do have a bootable operating system.
The BIOS reset jumper is in its normal place, and I even changed the battery on the motherboard to see how it goes -- the problem remained.
Thanks in advance!
-- Best regards,
James He
Hi James!
I would be doing the following:
0. Making sure I am using the proper procedure to save the settings as I leave the CMOS setup program. Some have the ability to exit without saving permitting the use of the settings one time only. I would make sure that I save and exit. I would also look at any CMOS security settings just in case.
1. Reading the MB manual with specific attention concerning how the CMOS is powered and controlled. I often find these PDF on the web if they are not in hand.
2. Measuring the actual CMOS battery voltages - with a volt meter out of box and with a simulated load if I could figure out with that was (if it holds with a 1K resistor my guess is that it is fine). I would also look into measuring it as it feeds the CMOS on the MB (very carefully of course!!).
3. Taking some time to clean and look at very closely the battery holder and associated parts.
4. I would try removing or changing the CMOS jumper you mention and also take a good look it it's integrity and clean the posts as well and try another jumper.
5. If all this did not clear the problem, considering another MB.
Good Hunting!
Tod
On Thursday 23 February 2006 19:17, Tod Merley wrote:
Date: Thu, 23 Feb 2006 16:51:28 -0500 From: "James He" icrazy@gmail.com Subject: [OT] Cannot save BIOS settings To: fedora-list@redhat.com Message-ID: fd0f51b90602231351h361b635cx4da7fce0941a8534@mail.gmail.com Content-Type: text/plain; charset=ISO-8859-1
Hi, all!
This might be off-topic, but since we are running FC on this machine, so maybe you can help.
I replaced a bad motherboard with a new one for one computer and the computer started to be working again. The only problem now is that I am not able to save the BIOS(Phoenix) setting on that computer, that is to say, the default setting will always come back automatically. This is not acceptable, for we need to boot the computer from network, but the default booting sequence prefers to boot from hard disk, on which we do have a bootable operating system.
The BIOS reset jumper is in its normal place, and I even changed the battery on the motherboard to see how it goes -- the problem remained.
Thanks in advance!
-- Best regards,
James He
Hi James!
I would be doing the following:
- Making sure I am using the proper procedure to save the settings as I
leave the CMOS setup program. Some have the ability to exit without saving permitting the use of the settings one time only. I would make sure that I save and exit. I would also look at any CMOS security settings just in case.
- Reading the MB manual with specific attention concerning how the CMOS is
powered and controlled. I often find these PDF on the web if they are not in hand.
- Measuring the actual CMOS battery voltages - with a volt meter out of
box and with a simulated load if I could figure out with that was (if it holds with a 1K resistor my guess is that it is fine). I would also look into measuring it as it feeds the CMOS on the MB (very carefully of course!!).
- Taking some time to clean and look at very closely the battery holder
and associated parts.
- I would try removing or changing the CMOS jumper you mention and also
take a good look it it's integrity and clean the posts as well and try another jumper.
- If all this did not clear the problem, considering another MB.
Good Hunting!
Tod
These batteries deliver micro-amps. Maybe a 100k resistor. (They usually last 3 to 5 years in service.)
On Thu, 2006-02-23 at 16:17 -0800, Tod Merley wrote:
- Making sure I am using the proper procedure to save the settings as
I leave the CMOS setup program. Some have the ability to exit without saving permitting the use of the settings one time only. I would make sure that I save and exit. I would also look at any CMOS security settings just in case.
I'd also check there aren't jumpers for protecting against changes to the BIOS settings. Some motherboards have hardware protection against this.
Thanks everybody for replying.
I checked almost everything you guys suggested and at last I found that it was due to a BIOS's bug. After I flashed the BIOS to the latest version, everything goes OK. Thanks again!
FYI: http://www.tyan.com/support/html/b_s2466.html
TYAN Tiger MPX ( S2466N-4M ) V4.06 New features and Fixes : Fixes bios resetting during reboot issue. Fixes hang on shutdown issue when no keyboard is present.
On 2/23/06, Tod Merley todbot88@gmail.com wrote:
Hi James!
I would be doing the following:
- Making sure I am using the proper procedure to save the settings as I
leave the CMOS setup program. Some have the ability to exit without saving permitting the use of the settings one time only. I would make sure that I save and exit. I would also look at any CMOS security settings just in case.
- Reading the MB manual with specific attention concerning how the CMOS is
powered and controlled. I often find these PDF on the web if they are not in hand. [...]
-- Best regards,
James He