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#1
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Boot order changes by itself
After being away from my desktop for a month, last night I plugged the
power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 |
#2
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Boot order changes by itself
On 7/3/2014 7:28 AM, Rebel1 wrote:
After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 Since it's only a buck or so, I would put in a new CMOS battery. |
#3
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Boot order changes by itself
On Thu, 03 Jul 2014 08:25:36 -0500, Grinder
wrote: On 7/3/2014 7:28 AM, Rebel1 wrote: After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 Since it's only a buck or so, I would put in a new CMOS battery. That'd be my guess too. -- (\__/) M. (='.'=) If a man stands in a forest and no woman is around (")_(") is he still wrong? |
#4
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Boot order changes by itself
On 03/07/2014 16:03, Mark wrote:
On Thu, 03 Jul 2014 08:25:36 -0500, Grinder wrote: On 7/3/2014 7:28 AM, Rebel1 wrote: After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 Since it's only a buck or so, I would put in a new CMOS battery. That'd be my guess too. +1 |
#5
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Boot order changes by itself
Rebel1 wrote:
After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 Agree on the CMOS battery. But on Asus, there is a second possibility. If the computer crashes in POST, the BIOS can auto-reset the settings to stable values. It's a way to fix an overclock so the user is put back in control. I've had problems with this happening "spontaneously" before, and it's the recovery mechanism doing it. Cranking down the overclock, helped :-) (On Asrock, it takes three pushes on the RESET button to do the same thing, reset the BIOS settings.) But if you know it's a CMOS battery problem, then that's the cure. The CMOS battery discharges in 2.8 years, if you switch off or unplug the PSU. If you leave the PSU in the ON position, so +5VSB flows to the motherboard, the CMOS battery can last as long as 10 years (i.e. shelf life value). It's then a matter of budgeting mains power pricing, to leave the wasteful PSU running, versus the replacement cost of a battery if you decide to disconnect the mains each night. Paul |
#6
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Boot order changes by itself
On Thu, 3 Jul 2014, Paul wrote:
Rebel1 wrote: After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. R1 Agree on the CMOS battery. But on Asus, there is a second possibility. If the computer crashes in POST, the BIOS can auto-reset the settings to stable values. It's a way to fix an overclock so the user is put back in control. I've had problems with this happening "spontaneously" before, and it's the recovery mechanism doing it. Cranking down the overclock, helped :-) (On Asrock, it takes three pushes on the RESET button to do the same thing, reset the BIOS settings.) But if you know it's a CMOS battery problem, then that's the cure. The CMOS battery discharges in 2.8 years, if you switch off or unplug the PSU. If you leave the PSU in the ON position, so +5VSB flows to the motherboard, the CMOS battery can last as long as 10 years (i.e. shelf life value). It's then a matter of budgeting mains power pricing, to leave the wasteful PSU running, versus the replacement cost of a battery if you decide to disconnect the mains each night. Well people keep their computers on for more reasons than making the battery last longer. I doubt anyone really leaves it on for that reason. If nothing else, it seems like any time I turn off my computer, I immediately remember something more I needed to do on it. So yes, I tend to keep it on. But if someone is cheap about the battery, the simple solution is to get a larger capacity battery, and wire that in. I had a nice LCD clock, a display larger than many, that I got years ago, and when the button cell finally died, I couldn't be bothered to look for a replacement and spend the money, so I soldered an AA battery into the clock, and left it hanging outside the case. That just lasted forever. Of course it helped that it originally ran off 1.5V. Michael |
#7
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Boot order changes by itself
Thanks, everyone, for the battery suggestion. So simple. I'll followup
on it. R1 |
#8
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Boot order changes by itself
On 03/07/2014 8:28 AM, Rebel1 wrote:
After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. W8.1. AMD Asus M3A76-CM mobo. Thanks for your suggestions/comments. I used to have the same problem. It seems to get caused by plugging external USB or eSATA hard drives into the machine, even if you're not going to boot from those devices. Yousuf Khan |
#9
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Boot order changes by itself
On Fri, 04 Jul 2014 01:24:58 -0400, Yousuf Khan
wrote: I used to have the same problem. It seems to get caused by plugging external USB or eSATA hard drives into the machine, even if you're not going to boot from those devices. Ditto, along with a whole bunch of mess with installing a SSD (similarly related). Same goes for moving around HDDs on s/pata cables. Second time up, migrating the old SSD for a new, happened to catch on. New game plan, evidently, is to watch for BIOS drive-boot assignment switcheroos, whenever messing with it (what it was, no longer if a change takes place). Cool new game: Semi- or almost-SMART (for something maybe) BIOS features. Can hardly wait to migrate to an all-GOOEY BIOS. |
#10
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Boot order changes by itself
On Thu, 03 Jul 2014 08:28:14 -0400, Rebel1
wrote: After being away from my desktop for a month, last night I plugged the power cord back into the wall outlet and booted without any problems. I performed various tasks for several hours and shut down normally. This morning when I tried booting I got a message something like NTLDR is missing. Since I had this same problem two months ago, I knew what to do: in the BIOS change the boot sequence from one of the two physical hard drives to the other. But what's causing the BIOS to change the boot order? The previous session, there were three program updates: Firefox, Thunderbird, and Adobe reader. I'm not blaming any of those updates, but mention them for completeness. Failing CMOS battery, perhaps? |
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