New build problems

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Hello to everyone

I built a new 4k computer May 2017

The main three problems I had was
1. No beeps on my computer because my case was the Corsair Air 740 and it didn't have a speaker cable to add it to the motherboard,

2. The Debug LED code was 'CO' but in the motherboard book code it says 'Reserved' ?

3. On boot up a red light on my motherboard that kept coming on it was the vga light only

Because my computer case didn't have a speaker so I added one from old computer to hear the beep codes, so on boot up there was two beeps and the 'CO' led also the red vga light was on so I turn off the computer,

I check all the cables took out my GTX 1080 TI card and put it back in but the still the two beeps and the vga red light and 'CO' code led was both on so I turn off the computer again,

I used my laptop to search online for the problem but what I found was many talk about it was the memory sticks, PSU, Can't open the Bios, Motherboard, can't open Windows 10 problems but none of these was the problem for me and nothing about the Debug code but still it boots up and I can open the Bios and it loads Windows 10, also I can play games.

Then I found a website for the Debug code from Gigabyte website it just says this is for "Reserved for future codes"? I was confused, I also found a website for the beep codes and information to fix the red light problem I turn off the PSU and unplug the power cable and press the "COMS_SW: Clear CMOS Button" on the Z270X Gaming 7 motherboard,

I waited just five minutes and plug in the power and turn on the computer then the computer shut down and restart and I went into the Bios and change a few things then the computer shut down again and restart it self then I hear only one beep code and Windows 10 loaded the red vga light was gone, but still the 'CO' code was on strange!

But now I turn on the computer I don't hear any beep codes again on the boot up but everything is running ok on a SSD drive.

So is it the Motherboard? That is the question I would like to ask any of you in your own opinion,

Thank you for taken the time in read this Thread
 
I saw another C0 post on another forum, turned out to be a ram stick issue, can you try one stick of ram, assuming you are using 2 ;-)
Andi.
 
I am using 4 stick of ram 32gb and Dark pro cooler that covers the ram that would mean I would have to test each stick of Ram? what I don't understand is why my OC software didn't pick it up if one bad ram stick or windows 10 so the Debug should be '00' or something? can you also tell me where this post was please on the 'CO'

Thank you.
 
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An update
I have just found the problem on the motherboard both Bios switches was set to SB 1 Dual and Bios_SW 1 Main when it should be SB 1 for Dual and Bios_SW 2 backup now I hear the beep code again on boot up and the Debug led have change to 'AO' means everything is ok by gigabyte

Thanks

This is my rig
Intel i7-7700K Quad Core 4.2GHz LGA1151 VR
Be Quiet BK019 Dark Rock Pro3 Heatsink and Fan
AORUS GA-Z270X Gaming 7 1151 Motherboard
Gigabyte AORUS NVIDIA GeForce GTX 1080 Ti Xtreme Edition VR
Corsair CMK32GX4M4B3200C16 Vengeance LPX 32 GB 3200mhz
Corsair RMi Series RM850i ATX/EPS Fully Modular 80 PLUS Gold
Acer Predator XB321HK 10 bit IPS
Corsair Airflow blue 140mm 2x
Corsair Airflow blue 120mm 3x
Corsair Carbide Series® Air 740 High Airflow ATX Cube Case Black
WD 250 GB 2.5-Inch Internal Solid State Drive - Blue.
WD 2TB Black
WD 2TB Green
 
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