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Thursday, 13 September 2012 12:28

Dead Laptop Diagnosis

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Does not turn on or do anything when power button is pressed

  • this is most likely the power regulator has been blown, checked with multimeter to see if the power gets past the FETs and regualtor as per tutorial
  • see if the laptop powers on with the battery and/or the mains
  • clear bios sometimes works

when power button is pressed the fan powers up and lights turn on. they either follow a pattern of a laptop reseting or they stay on as you would expect normally and the hdd powers up but nothing on screen either internal or external

  • this is most likely a faulty graphics chip and the solution is to reflow. sometimes it can be the chipset chip but this is rare unless there is not dedicated graphics chip in which case it is the chipset chip
  • this can also be caused by a dodgy bios, clear bios
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