[SOLVED] ASUS Sabertooth 990FX R2.0 wont post

MaxTehLegend · Apr 12, 2017

So i recently had this problem where my ASUS Sabertooth 990FX R2 motherboard wont show my ethernet cable in windows even though the lights at the back were blinking which means the motherboard detects the ethernet cable. So then i reinstalled windows. Nothing. Installed realtek lan drivers. Nothing. Then i thought that it must be the bios since the bios was so old. So i downloaded the bios, went into bios and flashed the bios. It said "updated successfully! System will reset!" But it was frozen. I waited 10 minutes and reset it myself. Now it boot loops and im getting a constant red DRAM LED and sometimes blinks CPU LED. Does anyone know how i can fix this problem???

Thanks.

problematiq · Apr 12, 2017

that's not good. If you flashed it then restarted it before it finished, the best you can do if it does not have a dual bios is to send it to the manufacture and have them flash it.

faalin · Apr 12, 2017

Hold down the mem ok button, the computer will boot and go through a test and should shut down at the end. after words the computer should boot up. Had the same exact issue on my Asus R3E board when I changed ram.

MaxTehLegend · Apr 12, 2017

problematiq :

It said it was successfully flashed, and i cant send it back so thats not an option.

MaxTehLegend · Apr 12, 2017

How long do i have to hold down the mem ok button for? And do i do it when the computer is off or on?

faalin · Apr 12, 2017

have the computer turned off, hold the button down and the computer will boot up like you hit the power button, then just release the button and let it do its thing.

I did it a few weeks back, but I think it shuts down when its done. I always buy the ROG boards and they come with the ROG connect so I had it hooked up to another computer and could watch what it was doing on the other computer.

It doesn't take more then a few min to run the test, if the computer doesn't shut down after 10 min then ether hit the reset button and see if it will boot or hold the power button down to shut it down then boot it back up.

I swapped from 12GB to 24GB and my board would do the same thing, the cpu led would flash then the Dram would just stay lit. Swapped between the two bios, did multiple bios resets, and even drained all the power and pulled the cmos batter for 30 min but nothing worked. then I figured out the mem test button and it booted right up after the test.

MaxTehLegend · Apr 12, 2017

faalin :

have the computer turned off, hold the button down and the computer will boot up like you hit the power button, then just release the button and let it do its thing.

I did it a few weeks back, but I think it shuts down when its done. I always buy the ROG boards and they come with the ROG connect so I had it hooked up to another computer and could watch what it was doing on the other computer.

It doesn't take more then a few min to run the test, if the computer doesn't shut down after 10 min then ether hit the reset button and see if it will boot or hold the power button down to shut it down then boot it back up.

I swapped from 12GB to 24GB and my board would do the same thing, the cpu led would flash then the Dram would just stay lit. Swapped between the two bios, did multiple bios resets, and even drained all the power and pulled the cmos batter for 30 min but nothing worked. then I figured out the mem test button and it booted right up after the test.

The computer will turn on just by pressing the button once though

faalin · Apr 12, 2017

no hold the mem test button down and after a few second it should boot up, you will probably get a black screen but just let it do its thing.

MaxTehLegend · Apr 12, 2017

faalin :

So ive held the memok button down for 10 seconds and it stays on for a few minutes then shuts off. Then continulously boot loops. 10 second intivals of turning off and on.

faalin · Apr 12, 2017

hold the power button down to stop the loop and then try to boot the computer up.

MaxTehLegend · Apr 12, 2017

faalin :

Ok so ive stopped the boot looping but now when i turn it back on again it will keep boot looping

faalin · Apr 12, 2017

Normally when an asus board does a boot loop it means the OC has failed, hitting the power button to turn it off and then turning it back on acknowledges this and it boots with default setting and forces you to hit F1 to enter the bios.

Not sure why that board keeps going into a boot loop.

MaxTehLegend · Apr 12, 2017

So ive managed to fix it myself, i plugged the usb into the flashback port and held it down for 3 seconds. Waited for blue light to turn off then turned on the PC and let it update itself. Now my PC boots normally. But im still having the same problem as previous bios. My ethernet cable wont show in windows. The LEDs turn on (orange LED always on green LED blinks) when the ethernet cable is plugged in. Ive tried installing lan drivers from the website: https://www.asus.com/uk/Motherboards/SABERTOOTH_990FX_R20/HelpDesk/ (windows 10 realtek version 10.9)

and when installing it stops and says something like "installation failed may be in deep sleep mode". Someone know how to fix this?

problematiq · Apr 12, 2017

MaxTehLegend :

So ive managed to fix it myself, i plugged the usb into the flashback port and held it down for 3 seconds. Waited for blue light to turn off then turned on the PC and let it update itself. Now my PC boots normally. But im still having the same problem as previous bios. My ethernet cable wont show in windows. The LEDs turn on (orange LED always on green LED blinks) when the ethernet cable is plugged in. Ive tried installing lan drivers from the website: https://www.asus.com/uk/Motherboards/SABERTOOTH_990FX_R20/HelpDesk/ (windows 10 realtek version 10.9)

and when installing it stops and says something like "may be in deep sleep mode". Someone know how to fix this?

Does it show up in the "Device manager"?

MaxTehLegend · Apr 12, 2017

In device manager>network adapters it shows WAN Miniport (IKEv2) WAN Miniport (IP) WAN Miniport (IPv6) WAN Miniport (L2TP) WAN Miniport (Network monitor) WAN Miniport (PPPOE) WAN Miniport (PPTP) and WAN Miniport (SSTP). But this is after i installed realtek LAN drivers. Before i installed realtek lan drivers network adaptors didnt show up. If i click view>show hidden devices it will show microsoft Kernel Debug Network Adapter.

MaxTehLegend · Apr 12, 2017

I dont understand why its happening. It just randomly didnt detect in windows. Even though the lights are blinking meaning the motherboard knows it exists. Ive tried reinstalling windows, different ethernet cables and nothing. Getting extremely frustrating at this point.

problematiq · Apr 12, 2017

MaxTehLegend :

thoes are only the wireless drivers, there is not one of thoes that is your LAN driver. is there an unknown device shown in the list somewhere?

problematiq · Apr 12, 2017

Also please post your exact motherboard model.

MaxTehLegend · Apr 12, 2017

problematiq :

MaxTehLegend :

thoes are only the wireless drivers, there is not one of thoes that is your LAN driver. is there an unknown device shown in the list somewhere?

In network adapters? No.

MaxTehLegend · Apr 12, 2017

problematiq :

ASUS Sabertooth 990FX R2.0

problematiq · Apr 12, 2017

MaxTehLegend :

problematiq :

In network adapters? No.

it would not be under network adapters. just ANY unknown devices in device manager.

MaxTehLegend · Apr 12, 2017

problematiq :

MaxTehLegend :

it would not be under network adapters. just ANY unknown devices in device manager.

I couldnt find any "unkown devices" in device manager.

problematiq · Apr 12, 2017

MaxTehLegend :

problematiq :

I couldnt find any "unkown devices" in device manager.

That's not good Brochacho. Means your OS doesn't even see a lan port. there's a button to "scan for hardware changes" in that window when you have any item in the window selected, click it and see if any show up.

MaxTehLegend · Apr 23, 2017

problematiq :

MaxTehLegend :

That's not good Brochacho. Means your OS doesn't even see a lan port. there's a button to "scan for hardware changes" in that window when you have any item in the window selected, click it and see if any show up.

nothing. no fix. i just bought a PCI ethernet port a few days ago to reduce my stress. it works and is faster than the motherboard ethernet port anyway. but there is another problem which is so annoying. the audio port doesn't work. it wont detect my audio anymore. ive done everything and nothing works. there are no unknown devices in device manager, when i plug my speakers in it doesn't show up in anything. windows cant see my audio ports or my ethernet ports for my motherboard. can someone fix this????

[SOLVED] ASUS Sabertooth 990FX R2.0 wont post

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