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ASUS Support Home Location : Forum > Motherboard > P8Z77-M PRO  
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  Topic : [Problem]Can't get into BIOS New Topic
syntax53
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Posts : 24
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Tech Points : 41
From: United States
Posted:6/22/2012 1:04:00 PM # 1
I just bought this board and I'm trying to set it up.  I flashed to the latest bios right away and it seemed to work fine.  As I was doing to some configurations in the bios I suddenly lost access to the bios.  Thinking I had disabled my USB keyboard by farting with the USB settings I grabbed a PS2 keybaord.  Unfortunately I still could not get into the bios.

I opened the case and popped the jumper over for the clear cmos.  Once I turned the machine back on I was able to get into the bios again.  I reset the defaults and only enabled RAID on the sata controller.  Saved and lost access to the bios again.  So once again I reset the defaults and didn't change anything this time and saved it... again no bios.  I don't understand what is going on here.

With the full screen logo turned on I see the "press DEL" to enter bios, but as soon as I press it, it just makes the screen go away faster and jumps right to the error about not having a boot device.  If I turn the full screen logo off, I don't even get a prompt to enter the bios.

Any ideas what is going on here?

Thanks

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Hiker
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Posts : 7428
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Tech Points : 7488
From: Sweden
Posted:6/22/2012 1:27:00 PM # 2
Hi syntax53,

Welcome to the club!
The behaviour you described is common with the latest 1206 BIOS. You can either downgrade BIOS to the previous 1016 version, or use the following workaround.
Press and hold F8 key during POST, until the boot menu shows up and there select "Enter Setup".

The Z77 boards allow downgrading of BIOS using any ASUS BIOS update tool. I recommend using either EZ Flash 2 or USB BIOS Flashback.

Store the extracted (unzipped) BIOS file on a FAT32 formatted USB stick.
For USB BIOS Flashback rename the file to: "P8Z77MP.CAP".

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ASUS P8Z77-V PRO (BIOS 2104) -- Intel i7 3770K -- Noctua NH-U12P SE2 -- 8GB (2x4GB) Corsair Vengeance DDR3-1600MHz 8-8-8-24 2T 1.5V -- iGPU -- System drive RAID 0 on 2x120GB Intel SSD 520 (6Gbs), storage on RAID 1, 2x250GB/16MB Seagate Barracuda 7200.10 SATA2, additional storage 1x250GB/16MB -- DVD-RW ASUS DRW-24F1ST -- all drives on Intel Z77 controller -- Antec P180B -- Corsair HX750 PSU -- Win7 Ultimate x64 SP1 -- Chipset Device Software 10.0.14 -- IRST 13.1.0.1058 -- UEFI/CSM, SSDs and HDDs GPT partition formatted -- IE11
syntax53
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Posts : 24
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Tech Points : 41
From: United States
Posted:6/22/2012 8:03:00 PM # 3
Thank you for the quick response.  Unfortunately I can't even get the machine to show video now.  Neither on HDMI or VGA.  If I plug a USB drive in with the P8Z77MP.CAP file on it, the machine turns on and then shuts itself off after a few seconds and turns itself back on.  It will sit there and do this over and over, and only if I have the drive plugged into the flashback port.  Do I need to hit something in a certain amount of time for it to use the flashback file?

I've tried resetting the CMOS a couple more times and even tried removing the battery (and power) for 4 hours
. Still no video.

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syntax53
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Posts : 24
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Tech Points : 41
From: United States
Posted:6/22/2012 8:18:00 PM # 4
Nevermind, I just found the instructions in manual for how to do a flashback.  Looks like the flashbook takes according to the flashing lights, but I still get no video :(  Tried two older BIOS's.

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HHC
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From: TAIWAN, R.O.C.
Posted:6/27/2012 3:45:00 PM # 5
Did you hold the USB BIOS Flashback button for 3 seconds till the LED next to it starts to blink while during S5 (soft off) state? If not, then you are actually running CrashFree2, which is no much help to you if the BIOS boot block is crapped.  Try holding the USB BIOS Flashback button for 3 seconds under S5 with your pen drive in the USB BIOS Flashback port and see if it reprograms your BIOS right this time.

By the way, as BIOS 10xx and above involves TPU firmware update, which takes a good extra 5~10 seconds to complete once it powers up by itself without any message, please leave it there for 30 seconds after the completion of the USB BIOS Flashback process, and see if that heals this problem for you.

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