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Hp pavilion a6300f pc is making a horn noise, when turned on, but no picture not

Last response: in Components
January 25, 2011 1:37:59 PM

the computer makes a horn noise for 30sec. off and on. i have no picture, no activity except this horn. what is the problem, ? i have cleaned the inside of dust, i have unplugged and plugged the power cord.
January 17, 2013 1:41:38 AM

i did it but it didn't stop the buzzing and still has no picture hope there is another option to fix my computer problem... email me at if you guys have any ideas thank you very much your help is much appreciated...