Question about HP Pavilion a420n PC Desktop

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ONLY STREAKS OF COLORS when TURNING ON!

My computer was working well. The last last thing i remembered is that the computer downloaded WINDOWS AUTOMATIC UPDATES. I dont know if it was installed properly by my little sister when she turned it off. Next day after, when we turn the PC on, the monitor will only show streaks and dots of different colors. What is possibly damaged here?

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  • Alvin Rodriguez Oct 09, 2008

    i have windows XP.. im suspecting that it was a result after the computer downloaded auto updates. ok, this is the paroblem.. if i turn the computer on, the monitor will display color streaks and dots.. sometimes it's just a blank black display, and sometime it also displayed the HP logo (with blue background) but somehow distorted.. if i turn the computer off, it will quickly turn off, nothing else happens. by the way, this is an HP Pavilion 764n

  • Alvin Rodriguez Oct 15, 2008

    thank you KenHall for the idea. its the graphic card that has the problem. now i only use the default card but is extremely low settings! how can i adjust it? i still dont have the money to by a new grphics card. or mybe can i fix my nvidia video card?

  • Alvin Rodriguez Oct 15, 2008

    on clearing the bios, what pins should be connected?

  • Kenneth Hall May 11, 2010

    what is the OS system you are useing.. there was a drawl back a while ago from AUTO updates about it sending viruses to many computers with XP and below.

  • jason May 11, 2010

    what does the screen do when the computer is turned off? , if it seems ok then it is probably the display chip on the motherboard or display card if using one.

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If it is doing it to the start up screen(hp) it is probably the display chip on the motherboard (you may be able to clear this up by removing the battery from the motherboard and clearing bios( connecting the two pins on the motherboard.
But before you do this check your video output with another tv monitor

Posted on Oct 10, 2008

  • jason Oct 15, 2008

    if you physically pull the video card out then do a restart then a shut down reinstall the card , then start up and see if it comes back, sometimes they just need to be removed to reset a lock up

  • jason Oct 15, 2008

    i or most most of us will just stop helpping you when you rate us before were done trying to help , exspecially that rating

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The problem is the update you downloaded someone mixed with your graphic chip.. causeing it to only display dots and lines. the hp logo with the back round is the start up page. here are 2 ideas you might wanna try.

1. if your graphics car is in a AGP or PCI, pull it out and try useing the default card build in the computer.. if it is the default go out and bye a cheap graphics card and see if that works.. if not return it and get your money back.

2. try useing a diffrent moniter.. your moniter might of blown out. if that still dont fix it you might need to contact HP or the moniters manufactuer.

hope this helped!

Posted on Oct 09, 2008

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