Hi, i just built my new pc, and when it posts it says "cpu fan error, to continue press f1" but pressing f1 nothing happens, ctr+alt+del doesn't work either, tried with 3 different keyboards now, also used an ps2 adapter but it doesnt help, and both the cpu fans are spinning. and the boot_device_led is lighting up, i have no clue what to do, is it a bad motherboard? it was nothing wrong with the memory after doing a memok test, i've also cleared cmos and flashed the bios to the latest, but it didn't help
Asus sabertooth x79
Intel core i7 3820
Corsair vengeance 4x4gb CML16GX3M4A1600C9
western digital 1tb
First, ensure a fan (best if it's the CPU fan) is plugged into the header called CPU_fan. Without anything there, the computer will not boot unless that safety is overridden in BIOS - not a good idea. To get into BIOS push delete key during the POST - turn on and rapidly hit delete until you're in BIOS.
If you have an operating fan (make sure the fan is working and the wires aren't caught in it or something) attached to the cpu_fan header, you should probably contact Asus for RMA info since cpu fan control is a function you want operational on the board
The cpu fan is connected to the cpu_fan, and cpu_fan2 since i have 2 fans( Thermralight silver arrow) and both is spinning, pressing delete doesn't help, as it seems that the keyboard doesnt work, i've tried with 3 different ones but none of the work, but they work fine on another computer i have.
Plan B - Update BIOS:
I am assuming that you cannot access the BIOS:
Next, if that fails then plan 'B' is to update your BIOS using USB Flashback and you'll need a USB Flash Drive formatted FAT32 and with no partitions -- the (.ROM) file must be extracted AND renamed to --- SABERX79.ROM
Latest BIOS is 1203 and I've have no issues with it.
USB Flash Back:
* Download the v1203 SABERTOOTH-X79-ASUS-1203.ZIP and Extract All (unzip files)
* Rename SABERTOOTH-X79-ASUS-1203.ROM -> SABERX79.ROM
* Copy (ROM file) SABERX79.ROM to the FAT32 Flash Drive
* Move to the WHITE USB 2.0 port @ rear I/O
* Watch the Videos and read the information here -> http://event.asus.com/2012/mb/USB_BIOS_Flashback_GUIDE/
* Press & Hold the 'USB BIOS Flashback Button' until the LED starts blinking and release
* Allow the process to finish
I cant enter safe mode because i haven't gotten installed windows yet because of this, i have allready flashed the bios to the latest version (1203). im clueless i think it's weird but i hope it gets fixed if i rma the board
just tried, still getting the same error maybe it has something to do with the gfx card? i put it into the second pcie slot because the cpu cooler is so big, the gfx card wouldn't fit in the first slot, maybe that can be it? probably unlikely though