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Had a power failure while hp m7067c was in standby mode. now can't turn it on.

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  • gbonnar Jul 22, 2009

    this cannot solve the problem. the hp m7067c is a desktop. the only button to turn it on is on the front panel.

    this does not work. there is a blinking green light on the back just below where the power cord connects which goes out after a while when i pull the power cord out. it starts to blink again when i put the power cord back in. those are the only signs of life from the pc. i had expected to find an on/off switch on the back just like my other desktop, but there isn't one.

  • gbonnar Jul 23, 2009

    Will need to check it further. cannot determine cause of problem even with the case open

  • gbonnar Jul 23, 2009

    where can i find a HP service center?

  • gbonnar Jul 24, 2009

    given that I was only able to work on the problem in the evening after work, and even then for only short periods at a time, you saved me a lot of time and effort. I have not fixed the problem yet, but feel confident I will be able to now that we've eliminated other causes.
    Thank you

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2 Answers

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  • HP Master
  • 3,866 Answers

The power supply may have gotten its fuse blown out. You can take it to a best buy they service these units for HP. Other then that you can call HP and if you are still under warranty they can ship out the part in question or if you do not want to have to deal with that you can buy a power supply unit it cost around $45-$65 bucks have it put in by best buy or a local computer shop and you will be in shape.

If the PC has been damaged beyond the power supply then it would be my advice if its still under its warranty to take it in.

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Rulds2008- GURU

Posted on Jul 24, 2009

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  • Master
  • 1,511 Answers

Sir sometimes people have this problem when they switch there devices to standby.

Solution to your problem is:

  • Remove the power cord (adapter) of your laptop.
  • Remove the battery from the bottom of your laptop for atleast 2 minutes
  • Reinsert the battery but donot turn your laptop on
  • Plug in the adapter cable and leave your laptop for atleast 30 minutes.
  • Now switch it on
I hope this solves your problem.
Please comment on this problem if problem is not solved.

Regards,
Waqar

Posted on Jul 22, 2009

  • 2 more comments 
  • Waqar Hassan
    Waqar Hassan Jul 22, 2009

    Sir i am sorry about the confusion, i really am.

    Can you please tell me how many lights are at the back and do they have any labeling like A,B,C,D or 1,2,3,4 ? Kindly also state there status.
    If yes then these are the your diagnostic lights and will help in resolving the issue.

    Regards,
    Waqar

  • Waqar Hassan
    Waqar Hassan Jul 22, 2009

    Please also tell me about any beeps or sounds made by your pc when you start it? if any.

    Regards,
    Waqar


  • Waqar Hassan
    Waqar Hassan Jul 22, 2009

    Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:


    1. Disconnect everything from the computer, including the power cord.



    2. With the power cord
      disconnected
      , press the power button on the front of the computer for five seconds.

      Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.

    3. With
      the power cord removed, flip the red voltage selector switch to the
      opposite position. Wait about five seconds, and then switch the red
      voltage selector switch back to its original location. Ensure that the
      voltage selector switch is on the correct setting, 115V for North
      America.
      Performing this step ensures that the voltage switch is engaged and set correctly for your country/region.




      Figure 4: Voltage selector switch
      Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.



    4. Plug a lamp into the same outlet to see if the wall outlet has power.
      Try the computer in a different outlet in order to eliminate the outlet
      as a possible source of the issue. Test both to see if the wall outlets
      have power.



    5. Remove all extension cords, power strips, surge protectors and any
      converters that remove ground. Plug the power cable directly to the
      wall outlet. Test for power. If this fixes the issue, find the device
      that is causing the issue and do not use it.



    6. Remove all attached devices except for keyboard, mouse, and monitor.


    7. Remove
      any internal component that was recently added, such as video card,
      memory, CD, DVD, and hard drives. An added device may take more power
      than the power supply is rated for. If the problem goes away when the
      component is removed, the only option is to upgrade the power supply to
      power supply with a higher wattage rating.




    8. Check the power switch:





      1. With the power cord disconnected, press the power button on the front
        of the PC. The button should release easily and not stick in the socket.



        • If the button sticks, it should be replaced or serviced.


        • If the power button does not stick and appears to be functioning, continue using these steps.



      2. With the power cord disconnected, remove the case or side panel.


      3. Follow the wires from the power button on the front of the computer to their connection on the motherboard.



      4. Look at the power switch cables connected to the motherboard. If the
        cable has become disconnected, connect the power switch cable connector
        to the connector on the motherboard.




        Figure 5: Power switch connector on Motherboard




      5. Replace the side panel, plug in the power cord and test to see if the
        computer can turn on. If not, continue using these steps.





    9. Find the defective part:




      1. With the power cord disconnected, remove the case or side panel.



      2. Disconnect all power cable connectors from their connectors on the
        motherboard and from the back of internal devices (the back of drives).
        Make sure to label or remember where each cable connects for future
        reference.




        Figure 6: Example of common power connections



      3. Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:




        • If the LED is on solid and is not flashing, the power supply is
          probably good and the problem is most likely caused by a defective
          component (processor, memory, PCI card) or a defective motherboard.
          Have the computer serviced, or remove the components and replace them,
          one at a time, to find and replace the defective component.



        • If the LED is still flashing (it should not flash with all connectors
          removed), plug the power cable into a different power outlet that is
          known to be good. If the LED still flashes, the power supply should be
          replaced.



        • If
          the LED light is now off, plug the power cable into a different power
          outlet that is known to be good. If the LED stays off, the power supply
          should be replaced.

    Source:
    HP

    Regards,
    Waqar


  • Waqar Hassan
    Waqar Hassan Jul 23, 2009

    Sir normally these issues are caused due to power supply failures. So if the above comment does not help, please seek help from a HP service center and get this power supply replaced.

    Regrads,
    Waqar


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