gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

[flobbadob]

Hello,
I built my system together yesterday, in a test setup config , i5 3570k, cooler master 212 evo, 8gb ram. The system posts fine and i can get into the bios and look at everything. But when the system is powered down then power up again, it does NOT post. The only way to make it post again i have found is to just leave the system off for a bit. I have no idea why this is happening, it could be something to do with the small connectors in the mohterboard, im using my cases connectors and cases buttons to turn it on and off and sometimes when i press the power off button it the system just ignores it, and it takes a couple attempts.


If you need more information ask away, any advice would be appreiciated.


P.S i can post with and without graphics card in this manner so it cant be that, the processor is at an okay tempearture in the bios (30c) , the ram is shown in there, everything is pretty much fine, except it just wont post more than once.


Another concern i had was that the power supply makes an odd high pitch noise when the system is powered down but the power supply is still on , could this indicate a faulty power supply? But how else can i know if its the power supply doing this because everything seems to work fine.

[profJim]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

We can best help you after you create a detailed hardware list in the System Specs portion of your
forum profile http://forums.tweaktown.com/profile.php?do=editprofile at the bottom of the
profile page or in your forum signature http://forums.tweaktown.com/profile....=editsignature.
Be sure to include brand names and model numbers.

[boondocks]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

If you hit the power button and it does nothing, could be wiring as you suggested but might be psu. Look over your wiring carefully and make sure the front panel connectors on the motherboard are fully seated.
Once you are satisfied the wiring is good then all I can suggest is try another psu, maybe borrow one if you can?

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

If you hit the power button and it does nothing, could be wiring as you suggested but might be psu. Look over your wiring carefully and make sure the front panel connectors on the motherboard are fully seated.
Once you are satisfied the wiring is good then all I can suggest is try another psu, maybe borrow one if you can?

The only time the power button is unresponsive is after ive turned the system on (via same button), my wiring is fine i think, everything is definitely working, since i can get a post if i leave the power supply off for a few mins then try again. Im starting to think it could be the power supply as well, but that doesnt explain why i could leave the pc on in bios for ages and the issues with power on/off.

[profJim]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

You might have a defective on/off power switch.
Unplug the on/off wire connector and carefully use the tip of a screwdriver to momentarily connect the two exposed on/off pins on the motherboard header to turn your system on and to turn the system off. If there are no issues when using the screwdriver, the on/off switch is probably defective.

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

i was using a screwdriver with the pins on the motherboard, and had the same issue, wherein it would start okay, but shutting off would take several attempts, so its not the cases power button or anything.

Currently experimenting with how long i have to leave it off with psu on for the system to be able to post. Another thing is, the power button/pins are only unresponsive when the motherboard has failed the post and just runs with the cpu fan running in bursts, as if it was trying to reboot itself over and over or something. When i try to turn off the system after the successful posts i have no issue, it turns off straight away.

[profJim]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

It sounds like your system is in a boot loop when it fails to post successfully.
Depending on a bios setting in the Power Management panel, you might need to keep the on/off switch depressed for 4 seconds or a bit longer to power off your system.
What is the brand and model number of your psu? How old is it?
Can you borrow another psu to test with?

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

okay so after having a couple goes it is clear, that the system WILL post again, if left off for around 6-7 minutes. Any idea why this is happening?

[profJim]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

Have you tried loading Optimized Bios defaults?
Have you changed any bios settings?
Try booting with only one memory module installed and see if the behavior is different.

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

It sounds like your system is in a boot loop when it fails to post successfully.
Depending on a bios setting in the Power Management panel, you might need to keep the on/off switch depressed for 4 seconds or a bit longer to power off your system.
What is the brand and model number of your psu? How old is it?
Can you borrow another psu to test with?

psu is brand new corsair tx550m , all this stuff is brand new, started building yesterday, ill have a look in the bios about the instant off stuff, but im pretty sure i have it set to instant off.

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

Have you tried loading Optimized Bios defaults?
Have you changed any bios settings?
Try booting with only one memory module installed and see if the behavior is different.

ive loaded optimised defaults for sure, not messed with anything in bios, ive tried booting with only 1 memory module and its the same thing with either.

[profJim]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

Keep in mind that it's possible for a brand new psu to be defective.
Using Optimized bios settings with a non-overclocked system is usually, but not always OK.
If the on/off behavior is completely normal with only one memory module installed, the problem is probably due to incorrect memory voltage settings.
Running Memtest86+ from a bootable usb or optical disk is a good first step to ensure that your brand new memory is OK.

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

Keep in mind that it's possible for a brand new psu to be defective.
Using Optimized bios settings with a non-overclocked system is usually, but not always OK.
If the on/off behavior is completely normal with only one memory module installed, the problem is probably due to incorrect memory voltage settings.
Running Memtest86+ from a bootable usb or optical disk is a good first step to ensure that your brand new memory is OK.

tried every ram slot, didnt make any difference, memory voltage isnt an issue though, since in the bios i did check that the memory was running at its quoted 1600mhz and 1.5v. Are there any other signs that it could be the power supply, i dont think ill be able to borrow one but can see.

[wazza300]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

if you do get into the bios again,download the latest beta bios to a usb stick and update the bios through qflash,then see if things improve

http://forum.giga-byte.co.uk/upload/...X-D3H_F17f.zip f17f is the latest beta bios for that board

[flobbadob]

Re: gigabyte z77x-d3h wont post reliably, posts, but after turning off and on, wont post.

what does bios flashing involve, im afraid ill screw something up. I saw the qflash option on bios i think, would i need to go on this?

also, is installing windows to my ssd and then booting that and updating bios from there a better option, or would it be better to do the bios updating now.