On Thursday 23 February 2006 19:17, Tod Merley wrote: > > Date: Thu, 23 Feb 2006 16:51:28 -0500 > > From: "James He" <icrazy@xxxxxxxxx> > > Subject: [OT] Cannot save BIOS settings > > To: fedora-list@xxxxxxxxxx > > Message-ID: > > <fd0f51b90602231351h361b635cx4da7fce0941a8534@xxxxxxxxxxxxxx> > > 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 These batteries deliver micro-amps. Maybe a 100k resistor. (They usually last 3 to 5 years in service.) -- Some people have convictions. Some people have opinions I think I'll have a cheeseburger!
