BIOS does not boot, no POST

Brumi

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Jun 26, 2015
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Hi all,

Probably this is a known problem to a lot of you. Yesterday, when I tried to turn on my computer, it wouldn't boot, the monitor didn't get any type of signal, and there were no POST beeps coming from the computer either. It had worked perfectly the day before, and I didn't do anything to the computer apart from pulling out my headphones.

After some trial and error, it turned out that if I remove the video card, the computer will boot and work correctly using the integrated graphics. But there are some strange things about this: while the computer does boot this way, it takes a few seconds longer than usual for the first BIOS screen to appear and the POST beep to happen. Additionally, the graphics card is the newest part of my computer, around 1 year old, still under warranty, while the motherboard is around 6-7 years old. So I find it a little hard to believe that the video card is at fault, I'm going to try installing it in a friend's computer to see if it works.

A few questions: does this scenario rule out the PSU being at fault? It is also relatively new compared to the other parts of my computer (little more than 1 year old and under warranty).
What is the next step to do if the video card happens to work in my friend's computer? If it doesn't work, it is quite obvious that I'll need to RMA it.
Is it possible that something is wrong with the motherboard's PCIe interface?

I know of this thread, but I'm not at home at the moment. I believe that most of the steps don't apply, as the computer successfully booted the day before, and still boots successfully without the graphics card.
 

Brumi

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Jun 26, 2015
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4,510
Bumping this thread because I still haven't found the solution, but I have a couple of new updates.

So the basic problem is that the computer does not boot at all (no POST, no signal to monitor either) when the video card is inserted, but it does boot and works perfectly if the video card is not inserted.

Here are the things I have checked:

  • ■ The video card works, tried it in a friend's computer.
    ■ The PCI-Express slot of my motherboard works, tried plugging in two different graphics cards into my motherboard and they both worked. And of course the integrated graphics also works.
    ■ It is not my PSU that is faulty. Got an alternative PSU today, tried powering my computer from that one, the symptoms are exactly the same: boots without the video card, doesn't boot with it.
    ■ Did the above with all my SATA devices completely disconnected (both from the PSU and the SATA cable), boots without video card (at least there is something on the screen: it says that no boot device was found), doesn't boot with it.
    ■ Successfully booted my computer with both of my memory modules separately, of course without the video card.
    ■ Tried resetting the CMOS, didn't work either.

So after all, I'm positive that something is wrong with the interaction between the motherboard and the graphics card. The graphics card has a PCIe 3.0 interface, the motherboard only has PCIe 1.0. Is it possible that the graphics card stopped working with the older interface of the motherboard? The motherboard of my friend's computer - where I tried the graphics card separately - has PCIe 2.0. Also, both graphics card I received for testing have 2.0. The problem is, I cannot find a friend at the moment who has a compatibile PC with a PCIe 1.0 slot.

Or does any of you have an idea what's going on here?
 

Brumi

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Jun 26, 2015
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4,510
These are my parts:

  • Motherboard: MSI 785GM-E51
    CPU: AMD Athlon II X2 250
    BIOS version: 2.2 (well, CPU-Z shows 2.2, but the I saw v02.61 at the bottom of the BIOS setup screen, don't know what version number is that)
    Integrated graphics: ATI Radeon HD 4200
    Video card: Gigabyte GV-N960IXOC-2GD (GTX 960)
    Power supply: Enermax MaxPro 400W
    RAM: Kingston HyperX 8GB DDR3

And we verified that my video card works in another friend's computer as well.

Note that I do plan on upgrading my motherboard & CPU, but still I want to determine what's wrong with my computer. The video card is still in its warranty period after all.

Thank you for your answer.
 

Brumi

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Jun 26, 2015
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4,510
May I ask, how could changing the battery help? I did clear the CMOS at some point and it didn't help. Can changing the battery help in another way? I haven't tried it yet, not sure if I have a replacement battery at hand.
 

Brumi

Reputable
Jun 26, 2015
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4,510

But the point is that the computer does boot without the video card, could even boot with another video card inserted instead of mine. And my video card works when inserted into another computer.

Knowing that my computer does boot, I highly doubt that the battery is dead.