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PC won't power on after cpu/gpu upgrade

Last response: in Motherboards
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September 5, 2013 12:51:37 AM

Before i ask my question, here are the specs of my pc for reference:

MoBo: Asrock 970 extreme4
PSU: Adata HM series 650W
Cpu: AMD Phenom II X4 955 Black Edition (old), AMD FX-8350 Black Edition (new)
GPU: MSI MSI N560GTX-Ti Twin Frozr II/OC (old), Gigabyte GV-R797OC-3GD (new)
RAM: G.Skill Ripjaws X F3-12800CL9D-8GBXL

So I decided to gift myself with an upgrade for my pc. After having taken out the old components, and building in the new ones, I tried booting up my pc. No succes. The debug LED-indicator on the MoBo gave debug code 97. According to the manual, this means a problem with one of the pci-e modules. after playing around a bit with power cables, I had the 6-pin power directly connected to the PSU and the 8-pin connected to a pair of IDE cables with the extension provided along with the graphics card. This would be a temporary solution as I have a proper 8 pin cable for the modular PSU over at my parents' house. The debug LED's would still give error code 97. I tried putting in my old graphics card and the pc booted. Even with the new cpu, I always thought I'd need to reinstall windows for an upgrade like that, apparently not.
After googling a bit, someone suggested moving the graphics card to a different pci-e slot. I did this, but not without a lot of hassle. The HDD made moving the graphics card hard because of the limitations the length of a SATA power cable imposed. At some point the graphics card scraped over some over the components of the motherboard. When the graphics card was seated and the power cables connected, I tried turning on the pc. Nothing. nothing happens. No beeps, no fans, nothing. The light from the usb hub in the front panel of the pc is on, so I know there's power running through the circuits. I tested the psu by connecting the green wire to ground, and it turned on just fine. I removed the motherboard from the case, and removed everything except for one ram module and the cpu. The pc still won't do anything, even when I hit the onboard on/off switch. I've left the pc like this overnight and tried again this morning; no improvement.
I haven't tested the different voltage rails of the PSU yet, as I need a new battery for my multimeter. I will do that later today.

All this leads me to believe my motherboard is fried. However, it seems strange to me that accidentally scraping my graphics card over some of the components of the motherboard would cause the pc to stop working altogether.

My question now is, could damage to a motherboard cause a PC to refuse to turn on? If not, do any of you have any suggestions on what else might be wrong?

Kind regards,
SheepSayMeh

UPDATE

I changed the CPU back to the original. The motherboard is now in the same state as it was before the upgrade. While I was tinkering, I noticed that one of the chips on the motherboard is getting hot when the power from the PSU is on. Specifically the one I have highlighted on the picture.



This is exactly the place I scraped with my graphics card. Does this indicate something is being short-circuited?

More about : power cpu gpu upgrade

a b ) Power supply
a b à CPUs
a b V Motherboard
a b À AMD
September 5, 2013 3:04:20 AM

it sounds more like the new gpu needs more power than a single pcie 6pin power connector and a molex to pcie adapter can manage, you will need the pcie 6 or 8 pin connector for your psu to use the new card.
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September 5, 2013 3:06:53 AM

Thanks for the reply!
After some research, I found that the chip getting hot is the nuvoton NCT6776D. This chip takes care of the AMD CPU power on sequence, according to nuvoton's product page. It seems my motherboard is indeed dead. At least I now know what the problem is and i can replace my motherboard.
Thanks a bunch for the assistance!
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September 5, 2013 3:08:36 AM

mauller07 said:
it sounds more like the new gpu needs more power than a single pcie 6pin power connector and a molex to pcie adapter can manage, you will need the pcie 6 or 8 pin connector for your psu to use the new card.


Yes, that's what I figured, but that doesn't seem to be the answer to the problem of pc just refusing to switch on.
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!