Z77A-GD65 Cannot boot from Bios A

Hi,
I was fine for years until about two weeks ago, when PC sometimes didn't boot up (no VGA signal, keyboard dead). I fixed the situation by trying to turn it on/off again few times and then it worked. Few days it was OK, and then it happened again. Fixed by the same way. Today, it happened again and I wasn't able to fix it.
I checked LED error code and it was cycling about 5 codes like 49,55,4F, .. (see the attachment). I tried to check/remove all components with no success. I also tried CMOS clearing (connect pins, battery out), but still nothing.
At the end, I tried to switch to Bios B and PC booted without any problem. I updated Bios B to the latest version and now I am fine. It also looks that problem is fixed.
But what is wrong with Bios A? I want to fix it and use it, but I don't know how. I tried to update the bios with Msi forum hq usb flashing tool (booted from Bios B and then switched to Bios A before flashing), but it is still dead.
Thanks a lot for your help.

I also had some sort of same problem (Bios A not booting, bios B OK)
BUT remember one thing: that bios switch is not really hardware. To really switch between bioses you must unplug power cord, wait for capacitor to discharge and then flip the switch.
So the sollution for you (that worked for me twice) is: clear CMOS (search forum for detailed method). Switch to BIOS B, Make bootable USB with BIOS version 10.5 (A5) (because this version REALLY works with option to flash the other BIOS). Update (or just downgrade to BIOS 10.5) and then clear CMOS with powercord out and battery out. Boot from bios B and within bios flash BIOS A from BIOS B. You will have same version on both Bioses. After that switch to BIOS A (again after clear CMOS etc...) and now you just can upgrade to which bios version you want using the USB bootable stick.
I now have BIOS A with version 10.11 (AB) and BIOS B with 10.5 (A5) just to restore BIOS A in case of failure.
First time when I did this was because mobo failed to boot and can't save OC profiles. Second time was (probably) because of many OC testing.

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been trying to install arch for almost 24 hours now. i just cannot manage to setup USBs to boot from.
first i was using unetbootin, but when the device not found error came up i tried using the methods recommended in the wiki. however, my hp elitebook 2540p cannot boot from the usb created using dd or imagewriter. so i went back to unetbootin and figured out the error was that the syslinux.cfg file needed to have ../../ replaced by archisobasedir=arch archisolabel=KINGSTON. now however, i cannot seem to figure out how to install a 64 bit system. when i run pacstrap all packages have i686 at the end, which i assume means its the 32 bit one.
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Last edited by iOfWhy (2012-07-29 13:01:10)

McDoenerKing wrote:Was the usb stick mounted, when issueing the dd command?
Did you use "of=/dev/sdx1" instead of "of=/dev/sdx" for the dd command?
Which image did you use?
i wrote exactly
sudo dd if=~/Downloads/archlinux-2012.07.15-netinstall-dual.iso of=/dev/sdd
as mentioned in the edit above, the computer wont get past the hp screen where one gets the option to press the esc key... the usb just blinks and nothing happens...
EDIT:
no the usb was not mounted...
the image was checked with both sha1sum and md5sum...
EDIT2:
ok so i think i am in... i reformatted the usb with fat filesystem, and then went through the second instructions from the wiki, ie installing "Without overwriting the USB stick"... But i am still wondering why i couldnt just do the normal dd method. Is it that the hp bios cannot read certain filesystems?
Last edited by iOfWhy (2012-07-28 13:39:40)

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panic(cpu 1 caller 0x001A7BED): Kernel trap at 0x894ec373, type 14=page fault, registers:
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0x817c39d8 : 0x12b0e1 (0x4555b4 0x817c3a0c 0x133238 0x0)
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0x817c3b08 : 0x19e517 (0x817c3b20 0xa83c980 0x817c3bc8 0x894ec373)
0x817c3b18 : 0x894ec373 (0xe 0x48 0x10 0x10)
0x817c3bc8 : 0x894db540 (0x0 0xa83c980 0xa4c5c00 0x1)
0x817c3c08 : 0x78d45139 (0xa4c5c00 0x1 0x0 0x13)
0x817c3c68 : 0x78d3e940 (0xa4c5c00 0x2407 0x817c3d2c 0xa4c5c00)
0x817c3c98 : 0x40c515 (0xa4c5c00 0xacd8130 0xacd8130 0x0)
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0x817c3d48 : 0x18c8aa (0xa4c5c00 0xacd8130 0x0 0x0)
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Backtrace terminated-invalid frame pointer 0xbffff378
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dependency: com.apple.iokit.IONDRVSupport(1.5)@0x78cc5000
dependency: com.apple.iokit.IOPCIFamily(2.4)@0x78ac0000
dependency: com.apple.iokit.IOGraphicsFamily(1.5)@0x78d36000
com.apple.iokit.IOGraphicsFamily(1.5)@0x78d36000->0x78d51fff
dependency: com.apple.iokit.IOPCIFamily(2.4)@0x78ac0000
BSD process name corresponding to current thread: WindowServer
Mac OS version:
9A581
Kernel version:
Darwin Kernel Version 9.0.0: Tue Oct 9 21:35:55 PDT 2007; root:xnu-1228~1/RELEASE_I386
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I really appreciate everyone's help.
I am certainly not above taking the machine in but I will say this.....
I have been building and working on PC's for 15-20 years. I have never once used or had the need for a repair shop. It is my hobby. I recently switched to osx to give the mac a try and I love it.
I will say that vista/xp has four times as many problems but at least i can fix whatever comes my way hardware or software.
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Cannot boot from osx or cd, help

Hi,
I have a problem. My macbook 5.1 boots only to windows, not to cd or osx. I am not sure what has happened but I think I installed the latest security update. I have a backup with time machine (osx) and vista with windows backup. I can wipe the whole disk clean (I do this only if I am absolutely sure it will work, CD is now unresponsive, what about if network fails...).
However, I cannot boot from CD, to verbose mode or to single user mode. None of the keys work (eject, c, s, v, cmd+c, cmd+v, cmd+s) anymore at startup. My installation dvd is stuck into the cd-rom. The eject button does not work in windows (otherwise the vista works perfectly). Also the refit screen has disappeared.
This problem is caused (to my knowlege) due to following actions:
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2. recovery from time machine to 2 days old configuration (last known working)
3. current status, no cd, osx or startup buttons
This is my work computer and I need the linux (osx) part on monday. Please help.
Juha
Technical details:
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- osx leopard
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- vista created with bootcamp
- timemachine 500Gb

I got the problem worked out. Now that I have the possibility to boot from cd I used the recovery from timecapsule again. Now it worked more properly. There is some issues with some programs and data (missing), but thats another story.
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Apparently there is a 'feature' that if you lose the connection between steps 1 and 2, the recovery program copies the network path that is empty (connection lost -> empty path). The program thinks everything is copied and gives 'recovery complete' message.
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Message was edited by: dve_

Cannot boot from DVD since 10.4.6 update.

My Quad cannot boot from the Superdrive at all.Upon updating I decided to repair permissions from the DVD but everytime I got to the Apple logo the fans powered up,full tilt. I had to turn the Quad off from the power button and start up holding down the mouse, in order to eject the DVD.
As far as I remember, I allowed the computer to start up twice, and disconnected all peripherals whilst updating.
I've tried zapping the pram and resetting the nvram to no avail.I've inserted Disk Warrior and that will not boot. The computer runs fine from the HD (although there was one occasion when, briefly, a small OS9-style Mac monitor appeared with a question mark, then made way for a proper boot), but I'm really concerned at this problem. I do not want to wipe the system drive and start from scratch,since I've only just finished migrating a whole buch of software from another G5, and I have TV job looming.
Incidentally, both my other G5's and Mac Mini updated with no perceptable problems. Can anyone shed any light on this and, perhaps, offer a solution (other than a wipe ! ).
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G5 Quad 2.5,G5's DP 2.5/2.0,Mac Mini Mac OS X (10.4.5) MOTU 2408's Mk3x3,24i/o,Hammerfall HDSP 9652x3

Any installation can theoretically cause harm. If you aren't backed up, you may be forced to use Target Disk Mode if you can't boot a DVD, or an external DVD burner that supports booting. Both LaCie and Otherworld Computing have external Firewire DVD drives that support booting. Target Disk Mode is described here:
http://docs.info.apple.com/article.html?artnum=58583
Fortunately when you boot via Firewire or use Target Disk Mode, you bypass the hard drive's bootloading software, which you don't when you use the internal optical drive.

Z77A-GD65 Cannot boot from Bios A

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