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My system keeps booting hard (fan runs very fast with great noise) and nothing appears on my monitor. What's the most likely cause, and how do I fix it?

2011-11-02 10:29:00
if you have windows cd boot on it and choose repair or reinstal
FIDELIS
2011-11-02 02:47:00
Hello, that is the classic symptom of having dust bunnies living in your fans....Follow the guide provided above and you should be ok.  Is it a desktop or a laptop?  Is it an HP laptop?  There were some HP laptop models where there were problems with the soldering in the video card coming loose and you would get no video as a result.  
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Jeff Fabish
2011-11-01 22:57:00
Hi Onuche,Does using another monitor help resolve the display issue? To troubleshoot the loud fans, I suggest you read How To Troubleshoot a Noisy Computer Fan