Changed fan but now won't power up...

Discussion in 'Acer' started by ace30963, Mar 11, 2016.

  1. ace30963

    ace30963

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    Hi

    I have an Acer Aspire 5742 and was experiencing problems with it overheating. I bought and changed the fan and now it won't power up. Thinking logically, the blue light came on when plugged into the main which shows it is charging so can't be the charger, so thought it might be the power button itself. I replaced that and still it won't power up. This laptop is a few years old now.

    Can you think of anything else that can cause this?
    Could it be the motherboard and if so, will replacing this help?

    Please advise?

    Thanks
     
    ace30963, Mar 11, 2016
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  2. ace30963

    something back

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    Welcome to the laptop-forums site

    Question:

    Does the fan spin on turning on the laptop.

    Can you boot it into the motherboard settings using the f2 key
    immediately after pressing the power button.

    If you are sure that all the internal cables were refitting properly, then
    you might have to remove the CPU heat shield and re-grease it using
    thermal grease.

    You may also have to do the same if possible with the GPU.

    That could have been the route of the problems all along.

    If you open it up again replace the the motherboard button battery
    cr2032.
     
    something back, Mar 11, 2016
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  3. ace30963

    Corzhens

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    From what I remember, that happened to the laptop of a friend, I'm just not sure of the brand. That overheating, according to the tech, has something to do with the fan. But if the fan runs all right then something's wrong with the motherboard. Sometimes it really happens because of the portability of the laptop unlike the desktop which is stationary. But I wouldn't check it myself, it's not worth my time. Bring it to a qualified tech and save yourself from stress.
     
    Corzhens, Mar 11, 2016
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  4. ace30963

    ace30963

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    Hi again,

    No the fan does not spin on turning on the laptop as the laptop doesn't power up (with or without the power cable attached or the battery). I have also tried holding down the power button for 30 seconds but no joy there either. I will dismantle again and re-grease both the cpu and the gpu and also replace the button battery and will let you know how I fare.

    Thanks for your help so far
     
    ace30963, Mar 12, 2016
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