HP Pavilion DV9000 squeaks when starting

Warning against failure
Many computers have built-warning systems in case of damage to some of their functions, they are audio signals that should give a hint for a serviceman which one hardware component fails.

So, if the computer squeals, you should listen to what kind of sounds they are and depending on take appropriate steps.

The HP Pavilion computers frequently recurring problem are badly soldered chipsets and graphics chips, with the result that the computer can while starting make the sound like a signal in the form of one long and two short beeps that evidence of damage to the graphics card.