Ongoing Issues Gigabyte Z97X-Gaming 7 - Devils Canyon Core i7 4790K CPU & Motherboard Bundle

discojohnno79 · 13 Feb 2015 at 22:56

Hi Guys,

I have replaced my computer as i had issues last week with a the specs below

VTX3D HD 7970 GHZ X-Edition 3072MB GDDR5 PCI-Express Graphics Card

Corsair Vengeance RED 32GB (4x8GB) DDR3 PC3-14900C10 1866MHz Dual/Quad Channel Kit (CMZ32GX3M4X1866C10R)

AMD Piledriver FX-8 Eight Core 8350 Black Edition 4.00GHz (Socket AM3+) Processor - Retail

Asus Sabertooth 990FX R2.0 AMD 990FX (Socket AM3+) DDR3 Motherboard

OCZ ZX Series 850W '80 Plus Gold' Modular Power Supply

i was getting an red led on the cpu light on MB and computer would not post

Now i have replaced everything expect the power supply AND ram with parts below and i still have no post but everything powers on and get an LED on board (A6) i reseated ram and tried stick on own but still the same.

Gigabyte Z97X-Gaming 7 - Devils Canyon Core i7 4790K CPU & Motherboard Bundle

Does anyone think that the Power supply could be the issue before i order replacement ?

Regards

John

P4Clock · 13 Feb 2015 at 23:22

Error code info
Ab - Wait user command in BIOS Setup.
A6 - Detect and install all currently connected SCSI devices.

remove the GPU and try to boot with onboard GFX

discojohnno79 · 13 Feb 2015 at 23:58

have just tried that and still has the same result a6 or ab , there is no post and no display, exactly the same as previos machine, cant think that else it will be ram tested ok

stulid · 14 Feb 2015 at 00:01

So you have the 8pin ATX plugged in near the CPU socket?

Try a single RAM stick, disconnect the drives and that is all you need to atleast get a image and enter the BIOS.

stulid · 14 Feb 2015 at 00:01

So you have the 8pin ATX plugged in near the CPU socket?

Try a single RAM stick, disconnect the drives and that is all you need to atleast get a image and enter the BIOS.

stulid · 14 Feb 2015 at 00:01

So you have the 8pin ATX plugged in near the CPU socket?

Try a single RAM stick, disconnect the drives and that is all you need to atleast get a image and enter the BIOS.

discojohnno79 · 14 Feb 2015 at 00:09

tried all of the above still the same error, exactly the same issues as with other parts very strange

stulid · 14 Feb 2015 at 00:17

You have 4 sticks of RAM, the chances of them all being dead is extremely slim, so I guess it has to be the PSU?

That is if you have tried connecting to the onboard GFX without gfx card attached, tired each RAM stick inturn and not got any drives connected.

AtaRo · 14 Feb 2015 at 00:25

discojohnno79 said:
Does anyone think that the Power supply could be the issue before i order replacement ?

If you got a multimeter test the power good signal of the psu if it is present.

It is the gray cable on the 24 pin connector, it should be about 5v when the psu is powered up.

Also checking the power good via a multimeter is not a 100% foolproof as the motherboard measures the time the signal appear, the other good way of doing it is via a psu tester, like the one below, it cost about a tener.

discojohnno79 · 14 Feb 2015 at 08:40

thanks for the replies guys. i have been as thorough as possible with testing. although not tested psu. but as same symtoms as before it seems to be likely that it is the psu. but i will get one of those testers too for future use

Bonjour · 14 Feb 2015 at 09:32

Get a £6 PSU tester. They can save so much hassle (and money) by eliminating or highlighting the PSU as a problem.

AtaRo · 14 Feb 2015 at 14:31

discojohnno79 said:
i will get one of those testers too for future use

If you wanna get the psu tester, I recommend the one with the lcd display that reads the power good signal delay time, there is cheaper one without the display but you will not be able to check the PG signal delay time if it is within specs.

discojohnno79 · 17 Feb 2015 at 10:00

guys, i have replaced the psu and i am still getting either ab or a6 looks like need to get in touch with gigabite, no posting etc

varkanoid · 17 Feb 2015 at 16:18

What you have to remember is the codes showing are not actually error codes. They show the stage the Motherboard is at during POST. So if it stops at A6 its because its encountered a problem and stopped. A6 is not an error code. Its the last step the BIOS executed.

If you look in the manual on page 124 this shows the running steps that the motherboad goes through. So if you look at the next code in the sequence

A7 Activated all currently connected SCSI devices.

It is having problems with whatever is connected to the SATA ports. If you look on P124 its already got past the IDE detection phase. Could be something to do with the RAID controller or whats connected to the SATA ports used for RAID. I believe it says SCSI as thats just legacy.

The actual error codes are the bottom of P126 and none are A6 or AB.

What I would do as you have not mentioned whether this has been tried is make sure that you have nothing connected to any SATA ports and try also each stick of RAM you have in the first and then the last DIMM socket to see if it boots.

I take it you have tried clearing the CMOS too ? I would try that first and if it still perists then possibly a problem with the SATA/RAID Controller.

Confused Stu · 17 Feb 2015 at 16:24

I would try stripping the system down to the bare minimum to see if you can get it to POST:
- board on something non-conductive outside the case (cardboard box?)
- Only plug in the CPU, cooler, single stick of RAM, and PSU. No HDD, SSD, optical drive, GPU, etc
- If it posts, update the BIOS to the latest one, then try adding one component at a time until you find the one that makes it fall over, or you have everything re-attached and the system is still booting.