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Hp Pavilion XT963 four beep startup and nothing

\015 I changed my power supply and turned on the cpu. I get four beeps then the montoir goes black.\015

Answers :

Hi,
\015\012
\015\012Since iam not sure about the beep noise that u get....becos there are different pattern for it.
\015\012
\015\012so iam pasting this link and let me knw the pattern plz..
\015\012
\015\012http://www.computerhope.com/beep.htm
\015\012
\015\012or else it could be the power supply which is not placed in properly try unplug and placing it back again.
\015\012
\015\012or let me knw the exact noise that u get is it a beep noise or clunking sound or very, quiet jet taking or Noisy fans.
\015\012
\015\012Thank you.
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