Question about HP Pavilion 520N PC Desktop

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Computer keeps restarting...

My HP Pavilion keeps restarting over and over, it will not let me start up on any safe mode. It will not let me reboot, I can't even start up from the last good settings. It just repeats over and over and keeps starting up. I can't access anything. I just want to reboot it to its old factory systems to be able to use it again. Any tips???

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  • domsean Apr 23, 2009

    I can't boot to BIOS. The unplugging didn't work. Thanks for the help though.

  • domsean Apr 23, 2009

    Wow ok nevermind guys. I just restored it to its factory settings and this should be fine, thanks for all your help though.

  • mrninja
    mrninja May 11, 2010

    can you boot to the "boot menu" or the BIOS?

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This is going to sound ridiculously obvious, but have you tried shutting off the power or unplugging it just when it begins to restart? That's worked for me when I had a similar problem with a different brand of computer. It sounds like a software problem, not a hardware problem. Rebooting usually solves things, unless your machine won't turn off -- in which case you have to turn it off by cutting the power. Assuming that you have your CPU plugged into a power strip, if your HP won't turn off when you hit the power button on the CPU, turn the power switch on the power strip to OFF and unplug the power strip.

Wait 10 minutes. Make sure the power strip switch is in the OFF position, then plug the power strip back in and turn on the power strip. Then turn on your computer. If you're using Windows, you should get a message on your screen that says Windows shut down abnormally and that scan disk is running to check your drive. Then Windows will either give you a choice of start-up in regular or safe mode, or else it will simply come up normally on its own. And then you should be able to check whatever settings you were interested in changing.

If this doesn't work, shut off the power switch and unplug the computer, and then call your tech guy: you have a bigger problem than rebootting Windows can solve. Good luck!

Posted on Apr 23, 2009

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It sounds like your hard drive is bad. You can buy a new hard drive or you can try SpinRite I love this program and has fixed so many issues.
you can find SpinRite here http://www.grc.com/sr/spinrite.htm

Posted on Apr 23, 2009

  • Andrew Apr 23, 2009

    it sounds like your hard drive is bad. You can buy a new hard drive or you can try SpinRite I love this program and has fixed so many issues.
    you can find SpinRite herehttp://www.grc.com/sr/spinrite.htm

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when you get into safe mode, go to your run prompt and type "msconfig" hit enter. got to startup, disable all.Go to services, disable all. reboot. if this works, try running an pdated antivirus scan. I recommend using Avast! which is like AVG. It can do a start up scan. also try running something like 'trojan remover' which is free to download.

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hi,

What device are you trying to connect? was there an error message when you plug in the usb device. try booting up your computer to safe mode with networking.

1. Restart the computer
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Keep me posted.

Thanks.

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No power or computer does not turn on. Issue: No power or computer does not turn on.
Cause: No power from the computer can be caused by any of the below possibilities.
  1. Connections not connected properly.
  2. Third-party hardware.
  3. Bad power cable.
  4. Incorrect power supply.
  5. Bad battery.
  6. Bad power supply, power button, and/or power board or inverter.
Solution: Connections not connected properly Verify that the power connection is connected properly to the wall and the back of the computer. If the connections appear to be connected properly, attempt to disconnect and reconnection both ends of the cable. If you have a power strip (surge protector) or switch used to turn everything on at once, temporarily disconnect the computer from that switch and connect that cable directly to the wall. This will help verify that the strip or switch is not bad. Verify that the outlet works by connecting a different component to that switch.
Third-party hardware If additional hardware has been recently added to the computer it is recommend that you temporarily disconnect that device or devices from the computer to verify they are not preventing your computer from turning on. Note: If the computer was working fine before you added the new hardware, removing the third-party hardware did not resolve the issue, and the computer is not beeping but is turning on, please see our POST troubleshooting document CH000607.
Bad Power cable Verify that the cable supplying your computer is not bad or damaged by using another power cable. If you have a standard CRT monitor, this cable can be used in place of the computer power cable. If you have a portable computer or laptop, when the cables are plugged into the laptop you should see a power light or battery charge light. If this light is seen, this is a good indication that the power cable is good.
Incorrect power supply If you are building your own computer or if the computer has never turned on since you purchased it, it is possible you are using a power supply that does not supply enough power and/or the incorrect type of power supply. Verify your power supply meets the requirements of your motherboard and processor.
Bad battery If your computer is a laptop or portable computer that utilizes a battery for mobility it is possible that the battery may be causing your issue.
  • If your computer powers on when the cable is connected to the portable computer but not when it is disconnected, we recommend you purchase a new battery.
  • If your computer does not power on when the battery is connected and when the power cable / charger cable is connected, try removing the battery and seeing if the computer can power on with only the power cable connected. If no power is still received, skip to the final section.
Bad Power Supply, power button, and/or power board or inverter If, after following the above sections, your computer still receives no power, it is likely that a hardware component in the computer has failed. It is most likely that the power supply has failed. If you do not plan on replacing the power supply yourself or if you have a portable computer, we recommend having the computer serviced by your computer manufacturer or a local computer repair shop. If you have a desktop computer and plan on trying to repair the computer yourself, we recommend you replace the components in your computer in the below order.
  1. First open the computer and verify the power connections. You may also wish to consider disconnecting the main power cable and reconnecting the power cable to make sure it has not become loose. Also verify the power button cable is correctly connected to the Motherboard.
  2. Replace the power supply with a new power supply.
  3. Replace the motherboard.
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