Electronics Forum | Wed Apr 03 03:19:37 EDT 2024 | ddfreeze
boots with cmos battery low message. I do not see a battery anywhere to replace. F1 utility does not seem to work. hard drive is good. do not have an A: boot disk
Electronics Forum | Fri Apr 05 01:25:14 EDT 2024 | ddfreeze
My research taught me that most older 486 motherboards have a similar CMOS substitution chip that you can purchase, or modify the one you have with a battery as shown.
Electronics Forum | Fri Apr 05 04:41:41 EDT 2024 | hta1979
I'm glad it was successful. According to them, the cmos setting was preserved. If the battery is completely discharged, it must be restored to the original state. The setup menu should work, but then there was no need for it.
Electronics Forum | Fri Nov 16 10:00:48 EST 2012 | davef
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Electronics Forum | Wed Dec 05 09:24:23 EST 2012 | rway
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Electronics Forum | Fri Apr 05 01:34:09 EDT 2024 | ddfreeze
the F1 bios menu thing did not work no matter what options I chose. The fix is to do the mod to the CMOS chip, or gamble on a substitute replacement.
Electronics Forum | Wed Apr 03 09:12:11 EDT 2024 | hta1979
You have to enter the setup utility.Power off the machine,connect AT keyboard to the rear port, power on,press f1, load the bios setup defaults, enter the hdd parameters,in the first menu (Standard CMOS setup) (Cylinder,Head,Sector,Wprecomp) save the
Electronics Forum | Fri Apr 05 01:23:29 EDT 2024 | ddfreeze
thank you so much for the info, wished I would have known previously, however I found the motherboard manual online, and located the Dallas CMOS chip soldered to the board. Found a lot of youtube fixes online. Dremel tool and some soldering, added an
Electronics Forum | Sun Apr 07 20:35:00 EDT 2024 | jayx
I'd say it's much easier to do the external batter mod than replace the whole Dallas module. I've done it, works fine. There is a chip in the socket next to the module, best to remove it and put back when you finish with the mod.
