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How often does it do this? if it does it every time you turn it on, then its a software problem/error. if this has happened once and it wont go on again, then its dead! take it back ASAP, btw good shoice of laptop, once its working!! :)
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maybe you have already done this, but remember that many laptops require that you remove the battery for about 30sec. as well as disconnect the AC power to reset them. Always try to do this when everything seems completely dead. Please let me know if it's working or not,and thanks for using fixya
i also have a compaq presario f572us that's been having similar problems. when i went onto the hp website i saw that apparently they've been having similar problems with this type of computer as they offer free repairs for 2 years after you bought it. you should probably check if this works for you too
Some searching on forums convinced me the inverter had failed. Picked one up for $65, removed the frame around the screen, removed the mounting screw for the inverter, and unplugged both ends of the old and plugged in the new. Put it back togeher and fired it up, bright again. Key here was that a remote monitor still worked which meant video card was OK. The lamp could have been bad, but apparently the life of lamps is pretty decent.
When you boot the computer back up go into Safe Mode and check to see if you can roll the computer back to the point before you installed the software.
If so this should work. If it works then run a virus scan, a defrag of the hard drive and cleans the temp files.
OR
You can do a diagnostic startup and uninstall Onecare. So once that it is uninstall ed it should be smooth sailing.
Here is a link for some startup / diagnostic software you could try after booting.
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