Computer not posting.

deltaluca

deltaluca

deltaluca

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17 Jul 2009
Posts
59
This happened about a month ago when i updated my BIOS and I resolved it by lowering the overclock on my RAM (to defaults).

Now it is happening again and I havn't managed to get my computer to post in over a day.

At that time I tried swapping the PSU to a known working (and identical) one, and that did not help the situation.

This time I have so far swapped my RAM with known working (and identical) RAM, and swapped the graphics card with a known working (and identical) one, and have also tried running with my old harddrive disconnected (I recrently bought a new one, and removing that also does not resolve the situation).

I'm hesitant to try swapping the CPU if i can avoid it, but ask what may be the problem?

I've even tried running with no graphics card in at all, and the motherboard speaker did not even beep as it would usually in such a case.
 
Gigabyte MA-700-UD3 Rev.1
Phenom II x2 black edition.
2x OCZ Platinum 2G DDR2
GeForce 9600GT
OCZ StealthXStream PSU 600/700W can't rmember at this moment
2 seagate hdd's

The build is about 2 years old.
 
I've also tried disconnecting all USB devices just incase! And of course, no difference either.

To add, whenever this happened in the past, including now once turned on, the power/restart buttons do not respond and I have to switch off on the PSU.
 
sounds like your mobo has given in mate if youve tried everything else check all your connections but sounds like your mobo has gone abit kaput
 
yes i dont know if you still got warrenty on the mobo some come with 3 years some with 2 but i would check that

have you tryed posting with just 1 ram stick ? in diffrent slots
 
even with no ram inserted it doesn't give any beeps signalling an errror or anything. It almost seems like the BIOS doesn't even start up, never mind check the system or post.
 
Okay, i tried swapping PSU again, and as expected; it didn't solve the problem.

The computer did begin to respond more normally at one point (actually once i swapped BACK to the original PSU). It managed to post once, and turned off with power button a couple times, but overall still exactly the same :P And still no beep when not posting whether RAM is inserted or not.

Last thing to try then, is to swap cpu.

I did have my cpu running very hot for a while a few months ago (up to about 85 from memory under games load (i noticed when my mobo issued a temperature warning, and that is what the temperature threshold was set at)) before i de-dusted the heat sink and applied some thermal paste. So I guess it's not entirely unlikely cpu might be damaged... but i would imagine if it was the cpu and not the mobo it wouldn't prevent the mobo issuing beeps on hardware fault or prevent it turning off with power button?
 
I'm going to assume it's safer with a potentially damaged mobo to test my potentially damaged cpu in a known working system, rather than testing a known working cpu in a potentially damage mobo?
 
Eitherway i guess i'm going to have to remove both cpu's to determine if the mobo/cpu is at fault. Probably means i should reapply thermal compound to them both?
 
TwistNut said:
the mobo wont dmg a cpu i wouldnt have thought mate its a solid way to see if its your mobo or cpu :)
Click to expand...

o_O O'rlly ?

It was Xmas eve and I was rushing to swap a mobo around ....

Long story short the motherboard eat several cpus, gpus and memory in the course of a few minutes as I swapped components in a vain attempt to get it working - Total damage to me was in excess of £500 :rolleyes:
 
Well a summary of events is:

Computer doesn't post, or give any error beeps; even if there is no gpu installed, or no ram installed with nothing else connected like hdd's dvd usb devices etc.

Swapping working ram doesnt help.
Swapping working psu doesnt help.
Swapping working graphics doesn't help.
(even though the fact it doesn't beep with no ram or graphics indicates that something else is wrong anyways)

So. If i put my cpu in a known working system, and everything is fine. Then it would be pretty much 100% clear mobo is to blame?
 
deltaluca - I went through the exact same problem as you and it lasted for about 3months and I hated every second of using a notebook hooked up to my monitor whilst I diagnosed the problem.

My problem was the computer would switch on, power up, but no display and no boot.

I searched all over the net and threads just seemed to stop with no resolution to the OP's problem.

What it came down to was I needed a new and more powerfull PSU. I had tried a previous working PSU but it didn't work. In hindsight this was because it was 550w and I needed an 800w which I have now.

This was by far the worst PC problem I ever had as it was so hard to diagnose and it was very hard to find good help on the internet. I ended up at one point RMA'ing my CPU and buying a new mobo. I reset my CMOS, tried different ram, graphics card, boot outside the box, monitor, monitor cable, no connections to any HDD's or USB peripherals etc etc etc lol.]

My mobo would always show LED's lit up red next to the cpu and ram indicating their was some kind of problem, when in the end, they were both fine.

I hope this solves your problem. Good luck :cool:
 
I don't think psu power is the problem. Apart from the cpu (the one in the non-functioning system is slightly more powerful) the two systems are exactly the same spec, except that the known working psu is 100w less powerful, but is working in this almost identical system which also has 2 hdd's, dvd player and usb devices connected (granted i don't imagine a usb device will draw much power :P). The working system with less powerful psu also of course has the gpu connected; and even with gpu disconnected in other system and ram also disconnected there is no fault beep as there should be.

Also the psus are respectively 600 and 700W which is 'more' than enough for my 2 year old - at the time mid-range - builds
 
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What case are you using?

I am doing a build at the moment using the Corsair Obsidian 800D and it hasn't got the 4 pin speakers.

Sounds to me like your mobo has had it.
 
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