non boot trouble shooting

its not solved my problem :(

Picked up the evga 750w g2 today and set it up a hour or so ago.

Firstly i tried the pc to see if it just decided to work but it didnt, so proceed to unplug psu connections with out removing it from cases totally as i didnt want to mark the new unit by fitting it in screw marks etc i may return it.

So switching too and from them both several times this evening they both just do the same thing no display.

Upon booting the computer seems to be working as normal yet not displaying nothing not even the bios and at one point the computer was running for 30mins before i switched off obviously with no display.

I dug out an old 8800gts and tried that had to rule out gfx as i thought it might be that but that just did the same.

At it stands i have now tried.

bios reset
ram module switching
hdd swap
new psu
old gfx card

only thing have noticed was that when its been running non of my devices are powering up keyboard mouse etc also tried this with all unplugged.

At the point where it could be beyond me
 
Assuming that the new PSU is not faulty (possible but unlikely I think), have you tried running the system with just the CPU, 1 stick of RAM and a graphics card.

As it's a 990FX board, you need a graphics card - any PCI-e card will do.

If it still won't show a display with any of those, are you able to check that the monitor is working properly? Sounds stupid, but it could be that the PC is working fine but the monitor has died or you have a connection issue!

If you still have no signal, you could potentially have a motherboard problem.

If however, you get to the BIOS with a display, shut down and add your boot drive. See if you can get to Windows with just the bare minimum set-up.

Thinking about it, can you try using the stock CPU cooler, just in case your closed-loop unit isn't working properly.
 
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ive tried bare minimum with no joy not sure if i can test the monitor, will try and grab a monitor from work and try that.

that being said when my cable is completely removed the monitor does have a screen that works and says no cables are connector. highly unlikely its the dvi cable but i can rule that out later
 
A monitor/monitor cable issue is unlikely but needs to be ruled out. It's starting to look like a motherboard issue.

If you're getting identical symptoms with the replacement PSU, then you can probably rule out the PSU as the fault.
 
Borealis said:
A monitor/monitor cable issue is unlikely but needs to be ruled out. It's starting to look like a motherboard issue.

If you're getting identical symptoms with the replacement PSU, then you can probably rule out the PSU as the fault.
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i can imagine there is no way of testing this other than a new board?

as it stands with the monitor/gfx cable etc is that when I unplug it , the monitor displays a "no signal detected" plug it in and that goes away and the led button just flashes.
 
If when you plug the cable in, the 'no signal' message goes away and the monitor has a blank screen, then the monitor is fine.

It is unfortunately sounding like a board problem now.

You've switched PSUs and tried running the with a different GFX card to rule those possibilities out. You've then run the usual CPU, 1x RAM, GFX card combo to no avail. If it still won't even get to the BIOS, then it's a board issue or the CPU itself - much more likely to be the board.

Why the board has suddenly gone bad is another question entirely. It could be a corrupted/bricked BIOS, but I also wouldn't rule out the possibility that your old PSU somehow damaged the board.
 
struggling for ideas now, luckily a friend is helping me out he has a spare everything but its a 140 mile trip down there but should have it diagnosed at least. only thing he aint got is spare cpu cooler.

not sure how likely that is to have gone faulty and i would imagine it would shut down if cpu was over heating.

Rad and pipes from cold get hot after 5-10mins

for a test purpose i can pick this uplocally for same price before my journey to test worth a shot?

https://www.overclockers.co.uk/arctic-alpine-64-pro-rev.2-cpu-cooler-hs-049-ar.html
 
Do you not have the stock AMD cooler that came with your 8320 or did you buy it OEM?

For £9 it's worth making sure you have an air cooler, just to make sure it's not the liquid cooler. With that thing, it may run just as hot as the stock AMD cooler, but it'll work. Usually an overtemp causes a shutdown though. When you say the rad and pipes get hot, how hot are we talking?

It's good you've got a friend who can help you swap everything bit by bit. It's really the only way to diagnose what the problem is at this stage.
 
Borealis said:
Do you not have the stock AMD cooler that came with your 8320 or did you buy it OEM?

For £9 it's worth making sure you have an air cooler, just to make sure it's not the liquid cooler. With that thing, it may run just as hot as the stock AMD cooler, but it'll work. Usually an overtemp causes a shutdown though. When you say the rad and pipes get hot, how hot are we talking?

It's good you've got a friend who can help you swap everything . It's really the only way to diagnose what the problem is at this stage.
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it not hot to touch but very warm but i thought that would cause a shut down over heating tbf

i suppose i will find out 2mrw only other option would be to rebuild but still feel theres a few years in this current build
 
If it was getting way too hot, then a thermal shutdown should have happened.

From where you've got to so far, it seems to point to the motherboard. Once you've diagnosed/confirmed the problem you can make a decision as to what to do. A new motherboard is a lot less than a new board and a new CPU.

Were you overclocking? If you weren't, then if you need a new board, get a 970 chipset board. It'll be cheaper and if you're not fussed with Xfire/SLI then it doesn't matter.
 
Well firstly im grateful for all the help i received on this forum/thread ty borealis.

Yesterday i headed to my friends house 2&half hours drive to get this sorted really miss my computer. We got cracking straight away he had a test rig set up. i decided to remove my old hiper and fit the NEW evga psu as this was a huge improvement and potentially its the route of the problem.

He still suspected the gfx so tried that first that work , then ram that was fine both sticks so next it was down to cpu or mobo.

Just before we decided to go any further i came up wih the wacky idea to try my NEW let me state that again NEW evga psu that i picked up thursday and you'll never guess what?

It Didnt ******G work arghhh they supplied me a faulty unit, it was the psu at fault again both faulty.

So 7hours wasted 40 quid fuel what an amazing day.

Gotta wait till 2mrw now to return and replace fuming as its another day down grrrr

But at least i no what it is!
 
At least you have now got to the bottom of the problem and know what the root cause was. It might be frustrating, but you have a definite diagnosis now!

Even the best PSU manufacturers have units that slip through quality control. Heck, it may have even passed all the factory tests only to develop a fault in shipping.

Having a test rig available is so useful. My main PC is an Intel system and the spare Pentium G3258 unit I keep at my parents' house also uses the same socket. If I ever get a problem with this build, I know I've got a full test rig an hour's drive away.

Before that I had used AMD systems, because with my dad also using an AMD system it made debugging his problems much easier. His current AMD build has been faultless, except for a Seasonic PSU that died very quietly and suddenly.
 
Borealis said:
At least you have now got to the bottom of the problem and know what the root cause was. It might be frustrating, but you have a definite diagnosis now!

Even the best PSU manufacturers have units that slip through quality control. Heck, it may have even passed all the factory tests only to develop a fault in shipping.

Having a test rig available is so useful. My main PC is an Intel system and the spare Pentium G3258 unit I keep at my parents' house also uses the same socket. If I ever get a problem with this build, I know I've got a full test rig an hour's drive away.

Before that I had used AMD systems, because with my dad also using an AMD system it made debugging his problems much easier. His current AMD build has been faultless, except for a Seasonic PSU that died very quietly and suddenly.
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Totally confused now, stuck at work today so ask a colleague to drop in at the shop and ask for an exchange ended up speaking to the tech guy direct on his phone.

They tried the new evga psu or there test rig and it posted straight away. but it didn't on mine or my friends rig any help?
 
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