no power light on front of computer and what causes it.

 

desktops

no power light on front of desktop computer and what causes it.

  • power supply (if cheap power supply, 6 months is too old, if expensive power supply, 3 years, but some dell power supplies just keep going if treated right)
  • power cable has come loose (it happens)
  • power switch on back of power supply has been turned off
  • keyboard or mouse is shot, try unplugging one or both of those and see if problem goes away - I have seen a mouse prevent a system from powering up.
  • video card

desktop computer powers itself off after a couple of minutes.

  • power supply (if cheap power supply, 6 months is too old, if expensive power supply, 3 years, but some dell power supplies just keep going if treated right)
  • cpu fan is dead
  • power supply fan is dead
  • video card fan has failed

check to see that your fans are spinning, and spinning at a decent rate of speed. cpu fans and video card fans spin fast, while power supply fans spin medium or sometimes even slow.

laptops

no power light on power supply of laptop.

  • dead power supply
  • dead battery - this could actually be overloading the power supply charging circuitry and possibly preventing the power supply from fully powering up. solution: remove the battery with power off and power up - if computer suddenly works, you have found your problem - it's the battery and you need to replace it.
    • laptop powers up for a short time then powers off.

      • dead battery - this could actually be overloading the power supply charging circuitry and possibly preventing the power supply from fully powering up. solution: remove the battery with power off and power up - if computer suddenly works, you have found your problem - it's the battery and you need to replace it.
      • cpu fan is clogged with cat hair or dirt or something else, or has simply failed. this is techie fixable in some cases, but you may need some replacement thermal grease for the cpu and the service manual for your laptop if it is out of warranty. laptops are NOT fun to take apart. Service places will still service it and I heartily recommend that route.
      • power supply (if cheap power supply, 6 months is too old, if expensive power supply, 3 years, but some dell power supplies just keep going if treated right)

      check to see that your cpu fan is spinning. there should be air blowing out the back f your laptop periodically after it has been powered up for a while.

      info

      Li-Ion batteries DON'T like heat. Neither do computers! so don't leave it out in the sun!

      for the cpu, take it in to get it repaired by an authorized service center - those are not fun to take apart and put back together.

      for the battery, you can do that yourself. for the power supply, you can purchase that yourself. (last link)

      Always run your laptop with a laptop cooler, unless perhaps you have a massive metal laptop like the toshiba qosmio - my mother's doesn't need one. If your laptop gets warm or hot on top or bottom, get one.

      laptop power supplies