Computer doesn't always post.

deltaluca

deltaluca

deltaluca

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Joined
17 Jul 2009
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59
This happened once a month or so back, where i had to try multiple times before the computer would get to the bios post screen (everything powering up, just no post beep or screen etc)

A couple days ago i flashed my BIOS, and now it's happening all the time. It happens when turning computer on, or even if computer is suspended and resumed; occasionally it will post first time in a normal amount of time, but sometimes it can take me up to 10 minutes of waiting a while to check if it eventually posts, and then forcing it to power down and turning it on again until it posts.

ONCE it posts, computer is perfectly fine and shows no negative symptoms, running (Aslong as i don't suspend it) for +10 hours (never tried longer).

Any ideas?
 
gigabyte ma770-ud3 rev. 1 w/ bios version f9g
amd phenom II x2 550 black ed.
2x2gb ddr2 ocz (platinum i think)
geforce 9600gt
ocz 600w stealth something psu
 
bios defaults were set when bios was flashed, and it started happening before i changed them at all. It's unlikely that ram could be the issue; i had issues in the past with the ram and had them thoroughly tested, including the one sent back when one was replaced for faults.

Sometimes it does post if i'm patient enough after a few minutes, usually i restart and try again before it gets to be that long :P

there are no graphical artifacts or ANY issue at all once it posts, it's simply getting to the post which it has issues with.

I'm going to try checking connections / if that fails trying a different psu later tonight.

---

As someone pointed out this happened before i flashed the bios (though only once or twice, whereas now it's every time virtually)
 
I tried swapping out a known working PSU. No difference whatsoever; exact same behaviour of sometimes posting straight away as normal, sometimes having to restart about 20 times before it will post (then perfect function until next shutdown/suspended).

All I can think to try now is to flash the BIOS afresh, probably to the previous BIOS version; although it did happen once or twice previously (over the course of several months) it was only when i flashed the BIOS that it became very bad. :/
 
Okay... it seems like my issue has been solved now; but i'm not quite sure 'why'.

For the past 2 years (since building the computer) i've had the voltage on my RAM increased to match the RAM specifications and i've 'never' had any stability problems. Even once this isssue started happening, as soon as the bios posted, there was 'never' any stability issue or anything.

And yet after regressing my BIOS to a previous version and still getting the same issue I noticed that when the CMOS values were defaulted after flashing the BIOS that the system was posting normally, and that as soon as i put back the same overclock settings which have always been stable, the issues began.

I havn't tried going back to the BIOS version I had previous to the issue occuring to test if the overclock settings which have always been stable were unstable with that bios version too, but it seems strange to me that just upgrading the BIOS can cause these issues as a result of overclocking RAM?

And surely any stability issue with overclocking RAM would manifest itself all the time? not just in making the ability for the BIOS to post unreliable?
 
You might say not debugging with CMOS defaults was a bit silly :P but it never occurred to me that it could be the issue given that it's been perfectly stable for 2 years :X
 
no, quite literally the 'only' thing wrong was that it would not post reliably, as soon as it did post it would be completely 100% perfect until i next tried to turn it on
 
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