Computer won't boot after changing PSU and GPU, PLEASE HELP!

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Roza

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Dec 25, 2013
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Hey guys,

I've replaced my GPU and PSU (Asus 7850, Corsair CX600M) and it worked fine, there was some artifacting when running antialasing on bf3 and finalfantasy realm reborn, so i tried reinstalling the drivers and after rebooting the machine won't turn on,

after turning it off and on again, the pc boots but when i get into windows the machine just freezes and i can't ctrl-alt-del can't move mouse or anything, so i have to hold down the power button, but upon trying to boot again the fans on the GPU keep spinning then stopping like hmm this is hard to explain but like vroom *wait 2ms" vroom and repeat.

I tried putting my old GPU while keeping the current PSU but still the freezes, i tried replacing both GPU and PSU to my old ones and im still getting freezes.

I've tried clearing the BIOS via jumper and taking out the battery, i've also used another GPU and it still freezes and won't boot up.

There are no BIOS beeps indicating any problems. My screen says there is no signal from the GPU and only my mouse is powered and not my keyboard during these boots.

my mother board is
M2N68-LA (Narra6)
8GB G.Skill Ram
2TB HDD
tried Asus 7850, tried 6670 and also GT 240

these freezes,didn't happen before i changed the PSU and GPU to the new ones, I'm thinking it might be a motherboard issue completely, (thought it was the GPU overheating seems it isn't, thought it was the PSU but switched it.)

Are there anythings that i could try or do you also think my motherboard is completely f**ked

EDIT: after leaving the machine off for a while the machine boots up like normal but freezes after trying to install new drivers (with the AMD GPU's). On the Nvidia GPU it goes to a blue screen and it won't boot again.
 
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Rocketninja16
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R

Roza

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Dec 25, 2013
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When am able to boot i can get into safe mode, and safe mode works fine no freezes, but after restarting the i just get a black screen and only my mouse is powered, not my keyboard, also all the fans are spinning as well.
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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If you can get to safemode I'd say that your mobo is probably fine, you can try doing a system restore from safe mode to a point before the driver messed everything up on ya. If that doesn't work, as much as I hate to suggest it, you can try reformatting windows. Might be a good idea to use a different drive if you have one, just in case that doesn't work, at least you don't lose all your stuff.

My gut says a system restore should work though, but if the driver really buggered the registry a format might be the only thing.

Forgot to add that once you have all this sorted out, find a driver cleaner to properly wipe your system of the drivers, restart, and then install the new card's drivers.
 
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R

Roza

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Dec 25, 2013
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Ok thanks! :) i'll give it a try but like i said i have to turn it off and on multiple times or leave it off for a bit and it starts working, after the crash it just doesn't want to boot but i've got a spare HDD so i'll whack that in and give it a try with the new GPU and new PSU, i just hope it doesn't crash while installing windows 7

EDIT: but it does freeze after running for a bit after it does start working,
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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I've seen hard drives going south do similar things, so it could be that. The other possibility is that the new PSU was defective and not providing enough power to the CPU, thus freezing it, but I've never heard of having less power damaging a cpu.

I have an ASUS ROG motherboard, and when the O/S acts up and crashes the system, sometimes it won't turn back on unless I do a manual power down and turn it back on. It's as if when windows crashes, it puts it into sleep mode and because it's crashed, hitting keys won't wake it back up.

Is there a chance that your CPU is overheating? Do you know what the temps used to be on it?
 
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R

Roza

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Dec 25, 2013
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Ok wtf, i put in my other HDD, put new PSU and GPU, installed windows 7 fine, went to preparing your desktop, and now it has just frozen.... what the hell...

HELP! PLEASE!
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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This will be a pain but, try it again with the old parts and see how it does. That would be what I try anyway.



 
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R

Roza

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Dec 25, 2013
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My CPU might be overheating (haven't checked the temps), but my PC was fine before i switched to the new PSU, like i said i did try using my old build,(the one that was working prior to switching the PSU and GPU) and it still freezes so i don't think the PSU is defective as this is happening for both the old PSU and old GPU and i have also tried old GPU with new PSU and still there are freezes

btw i did reinstall windows on another HDD ran install ran fine, but when it got to preparing for desktop, the system froze i have forced the machine off but now it won't boot, its gone to the same problem as before
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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Hmm...

- If you have another system available, try getting the latest BIOS for the board and updating it.
- Re-seat all power connectors, and re-seat your RAM just in case.
- I really would try the re-install with all of your old stuff in it, when windows is loading up the first time it hunts for drivers for the system you have it installed on, it could be trying to load a driver for your AMD card before you install one, and then crashing. It's a bit of a long shot but it's possible.

Right now, I can't think of anything else other than trying to re-seat the CPU. If you decide to do that, have a close look at the back of it to see if you notice any heat scoring.

Do you have any peripherals plugged in that aren't essential? I had an external drive screw things up once, unplugged it an "poof", system ran fine.

If none of the above works, I'd be inclined to say that yes, the motherboard or CPU might be toast.
 
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R

Roza

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Dec 25, 2013
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ok i've taken out a dimm and it seems to be working now for some reseaon i guess it was a faulty dimm slot or card not sure yet but seems to be working for the time being, thanks for the help man really appreciate it
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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I have no idea why I didn't mention that earlier, for this kind of thing it's one of the first things to check!

Guess I got distracted by the new GPU/PSU thing.

Bummer that a stick is down but hey, it's a pile cheaper than a new mobo/cpu!
 
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Rocketninja16

Rocketninja16

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Dec 28, 2013
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10,710


I have no idea why I didn't mention that earlier, for this kind of thing it's one of the first things to check!

Guess I got distracted by the new GPU/PSU thing.

Bummer that a stick is down but hey, it's a pile cheaper than a new mobo/cpu!
 
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