Motherboard model: Asus Maximus VII Ranger
UEFI Version: No idea
CPU: i7 4790k
Memory kit part number (s) and amount in GB: 2x4 Go
GPU: gigabyte gtx 970 g1 gaming
SSD/HDDs/Optical drives: 500 go SSD Samsung + 2x1 To Barracuda
PSU: CORSAIR RM RM750 750 W ATX 80 PLUS GOLD Certified Full Modular Power Supply
CPU Cooler: Be Quiet Pure Rock 2
PC CASE: Corsair SPEC 02
Operating system: Microsoft Activated Yes (Windows 8.1)
System Overclocked (provide details)? No
Hello, I am having a very similar issue of this post :https://rog.asus.com/forum/showthread.php?77117-Maximus-VII-Impact-won-t-post-(QCode-00-CPU-Led-on)
Unfortunately, I couldn't fix it.
I am not sure to remember how it started, but the main problem is that my computer isn't even able to start the bios.
As the title is suggesting it, there are little LED to show which component is considered as faulty by the motherboard. Here it is the CPU Led that is on. Also, the digit panel is 00.
On rare situations, it can be another LED/code that is on. Today I got VGA Led and also the HD (hard drive) Led.
On very rare case, my computer boots normally and I can access Windows.
By the past, I could fix this issue by updating/reparing the Bios with USB or with clearing CMOS.
However, today those tricks are not working anymore.
I also manage to fix the problem one time by changing the CMOS battery and it made the job for months.
Today, I am running out of ideas. Here a list of what I tried :
Buying a new PSU (650W from 750W, the one in the post is the new one) Changing the PSU didn't change anything to the problem
Updating BIOS with FlashBack method (I think it worked because the light stop blinking after some minuts)
Trying to start with only the CPU connected to MB
Checking the CPU (the thermal paste looks a little old)
Trying to give a little less pressure on the screws of the cooling system for the CPU
Trying others power outlet.
Here are some symptoms/fact that I could observ :
Code error 00
CPU Led on
When I success to start, I can use my computer normally. I used it during weeks without turning it down and it was fine, which makes me think that CPU is fine.
When I used the sleep mode, it has no worry to come back. However, if I let it too long in sleep mode (during the night), I will find that my computer turn off by itself in the morning.
Restarting are working.
Turning off then turning on instantly used to work but didn't work today.
When I success to start (after several try and clear CMOS), the bios is blurry in general.
On some wikipedia page, when I go down too much, the text starts to get blurry and bold.
My landlord used to make our appartment very hot. For some reasons, it was easier to start when the room was hot. And when I was opening my windows (cold room), it was harder for me to start it. Now, the temperature is just normal and I can't change it.
When I press the turn on button, sometimes it doesn't react (case button or MB button too)
When I press the CMOS button, it doesn't always initiate a start.
Here you can have a look at the thermal paste :
I don't really know what to do at this point. I would bet that the MB is falty and I was really hoping that it was the PSU but now we know that it was not the problem...
Please help me 😞
I do apologize if the English is bad, it's not my main language.