Re: to clear CMOS
- From: "SC Tom" <sc@xxxxxxx>
- Date: Sun, 3 May 2009 18:47:28 -0400
Replies embedded towards the end. . .
"Anna" <myname@xxxxxxxxx> wrote in message news:OgOG7dDzJHA.1492@xxxxxxxxxxxxxxxxxxxxxxx
"SC Tom" <sc@xxxxxxx> wrote in message...On my Asus board, the battery MUST be removed (as the manual states) in order to clear it. If I only move the jumper, not all settings are reset. I found this out for a fact less than 2 weeks ago when a BIOS flash went bad.
SC Tom
"SC Tom" <sc@xxxxxxx> wrote in message...Mine's the M2NPV-VM and it clearly states on page 1-20, step 2 to "Remove the onboard battery." If you'd like to see for yourself, go here:
http://dlsvr.asus.com/pub/ASUS/mb/socketAM2/M2NPV-VM/e2527_m2npv-vm.pdf
SC Tom
"Mike Hall - MVP" <mikehall@xxxxxxxx> wrote in message...I don't doubt that it does. Looks like Asus can't make up their minds.
:-)
--
Mike Hall - MVP Windows Experience
http://msmvps.com/blogs/mikehall/
"SC Tom" <sc@xxxxxxx> wrote in message...My guess is that on the newer boards, the jumper bypasses the battery completely (or more so than on the older boards) making it unnecessary to pull the battery. Engineering, you know- "If it ain't broke, redesign it!"
I was looking at the board you have as an upgrade, but it only has one EIDE channel, and unfortunately, I still have 3 EIDE devices that I'm not ready to part with. I really don't NEED to upgrade (my AMD 64x2 Dual 4800+ is plenty fast), but every once in a while I get that need for speed. Not having a larger income kinda curbs that feeling, but it's still there :-)
SC Tom
Gentlemen:
I've worked with a considerable number of makes/models of motherboards over the years and I really can't recall a single instance where it was necessary to remove the CMOS battery in order to reset the CMOS-BIOS settings to their factory defaults when the motherboard was equipped with a CMOS jumper. In every case that I've experienced it was only necessary to short the jumper to reset the CMOS-BIOS values.
As I'm sure you both know, many motherboards (particularly early types) were not equipped with a CMOS jumper so obviously the only way to carry out the preceding was to remove the CMOS battery for some seconds and then replace it.
I understand SC Tom's reference to that ASUS MB instruction indicating the need for also removing the CMOS battery in addition to shorting the CMOS jumper. All I can tell you is that it isn't the first time (and I'm confident it won't be the last time!) that a motherboard's User Manual (let alone technical advice from the manuf. itself!) provided misleading or outright incorrect info re their products & their use. Although I have to quickly add that our advice to users is virtually *always* follow the instruction(s) in the motherboard's User Manual/Guide.
Anyway, having said all this and notwithstanding my own experience re this CMOS battery issue, I learned a long time ago that when it comes to PCs, *anything* is possible.
So SC Tom...assuming you haven't already done so, have you tested to determine whether simply shorting the CMOS jumper without removing the CMOS battery will reset the time/date info & BIOS configurations?
As I replied to Mike, yes, I did try just using the jumper to clear the BIOS and some settings were not reset. To list a few settings that were not reset to BIOS default were:
Boot order
Onboard NIC not re-enabled
Onboard sound not enabled
Parallel port not enabled
Ability to boot- not enabled.
Granted, part of this might have been caused by the bad flash, but after removing the battery, then changing the jumper, changing it back, and reinstalling the battery, all was well and the settings were back to factory default.
Having worked on and with computer hardware since the mid-60's when I was in the Air Force, I realize that most manuals add things that aren't necessary, leave out things that are necessary, or are blatantly incorrect. And it is most certainly not relegated only to the electronics field. Try a shop manual for any vehicle sometime. It's easy to get hurt if you take them as gospel.
Incidentally, re your refererence to the fact that your motherboard has only a single IDE channel...
Are you aware that some of the newer (usually the higher-end ones) motherboards are now coming through without *any* IDE channels? And more & more motherboards - are equipped with only a single IDE channel. As the youngsters say, "SATA rules".
Anna
Yes, I realize there are lots of SATA-only MB. I just mentioned the one that Mike used because it was one of my choices if I did decide to upgrade. All things considered, I decided to stay with the one I have since it performs well enough for me (so far ;-) ).
BTW, mine has 2 EIDE and 4 SATA channels.
SC Tom
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