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Computer wont turn on

My little brother press the on button while computer was not fully shut down. it never came back on. i open it and whenever i try to turn it on the fan slightly move once and the AC adapter goes off. i have a couple of ideas on what might be wrong with this but your opinion will greatly help. what do you think is wrong and how can i fix it ?

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  • Leigh Perlmutter
    Leigh Perlmutter Jan 13, 2013

    It might have "moved" but it is not running, yes? THe capacitors on the motherboard frequently have some residual power in them to "move" a fan or even light a light briefly!

  • bd126981
    bd126981 Jan 13, 2013

    i opene the computer and yeah i think its still cycling ..however i think the m810 dc in cable isnt passing on enough electricity to the motherboard...iwhenever i turn it on it sends a small amount that makes the speaker make a small "bop" then the AC adapter green light goes off....can you help me with that? would it be the m810 ..or something else with the motherboard

  • Leigh Perlmutter
    Leigh Perlmutter Jan 13, 2013

    Unless there is some damage from rough handling I doubt that the cable is bad, but check out the end connectors and the pins it connects to. A bent pin or pushed in pin could give thaat effect.

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  • Master
  • 1,669 Answers

Check to see if the on/off switch is still cycling. Baby fingers sometimes push the buttons so far in that they can't pop out again. Change the switch if you can't get it to work!

Posted on Jan 13, 2013

  • bd126981
    bd126981 Jan 13, 2013

    you think so? why would the fan move then? help me please?

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knatcal
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You might have a cooling problem due to a fan malfunction. It is not clear whether it's the power supply fan or the CPU fan; in the latter case you might also have a thermal coupling problem. The symptoms you describe certainly seem to point to such.

My advice would be to replace the fan (or the whole power supply; you might also want to purchase a "Silent Power" unit for quieter computing). If it's the CPU fan and you are comfortable with, or know anyone comfortable with a bit of PC servicing, you might want to also unmount the heat sink from the CPU and replace the thermal paste between CPU and heatsink. Clean the heat dissipator (the black metal grille over the heatsink) with hot water and a bit of soap and dry thoroughly, or wipe it energically with a dust brush, before mounting the new fan on it.

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