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My laptop caompaq presario F700 has a small key hole next to power plug. I am told that this somehow has been lock and laptop is unable to power up. The screen is black no image and laptop does not power up but only for a few seconds and powers down. Has not been damage or droped. I tried ''F'' Keys nothing seems to work. How please can this problem be fix.

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Check your power adapter for juice with a multimeter.  Chances are the power cable is bad and your battery is dead.  That keyhold that you are talking about is a lock, but for the purpose of installing a cable lock so it can not be taken.  Most stores use these to prevent theft.

Posted on Mar 03, 2009

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Scan with a spyware/malware program

DEFRAG C:

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Clean up and repair registry problems with registry repair software of your choice

If the problem persists, did you check if it could be your Compaq Presario F700 laptop power cord or power source problem? Defective or insufficient power supply might cause error messages that are misleading. Take the battery out and power on your laptop with the charger only. Make sure your Compaq Presario F700 power jack and charger plug tip are securely connected. Did you notice the power jack loose? You can find laptop power jack on ebay. Fixing and soldering the power jack requires professional skill though. The charger green/blue LED should be on. If not, replace the defective charger. Compaq Presario F700 laptop battery charger, especially its power cord/cable, lifespan is limited and does not last forever, consider buying a lifetime warranty charger online from company like www.topmic.com

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