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COMPUTER WONT BOOT UP

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I was recently installing a video card for my girlfriends computer. After installing, the computer would hang on windows startup, unless I went through safe mode. But then I realized that I needed to disable the onboard video driver….

So once I did that, windows started up fine, but then out of nowhere it shuts off. Since then It starts up for a bit and then shuts off. Turns on and then off. When I went to the bathroom while the computer was open, she cleaned the inside of the computer with one of those dusters that keep the dust on them ( I guess they work with static??). Do you think she could’ve messed up the motherboard? I was thinking it could be the MB or power supply… PLease give your suggestions…

Thank you,
Martin

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If you remove the video card, does the system work normally? If so, the issue is most likely either the card is defective or drawing too much current from the power supply or overheating the system.

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I did try to remove the video card and its still doing the same thing. And I removed the hd, and it still turns off.

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Also, check to ensure you’ve disabled the on-board device driver for the original card. If its power-related, you can disable power for modem, NIC card, etc. to see if it stabilizes. If it does, you’ll likely have to upgrade to a higher wattage power supply.

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I did that, as I stated in my question. There should be no reason to upgrade power supply, when it was working fine before and nothing have been added. Not to mention that this is an oem computer.

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Well you can’t isolate the problem unless you try with a new power supply since you have already tried removing components and nothing happened. If you can try to read you psupply with a multimeter before getting a another one the better. Once you found out that the psupply is ok then I bet it’s a mobo issue.

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um, see if you have power management turned on fo rthe new video card? maybe the system appears shut off but is actually suspending or going into power saving mode? you can check in Device Manager video card properties and also in Control Panel/ Power
also check to see that all the fans still turn maybe a piece of duster is in one…:>)

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Well, the system itself turns off. Its not suspend. I mean, im not new to computers, so pretty much every common sense troubleshooting has been performed. I think that the motherboard is just gone. Im gunne try to install another, or just buy another computer.

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