Question about HP Pavilion a705w PC Desktop

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Power light blinks

Hi. I have a HP Pavilion PC Desktop. It doesn't turn on anymore. The on button on the front blinks and a light in the bac near the plug thing blinks too. I've unplugged it and plugged it back in. When I unplug it, the lights continue to blink for about 2 minutes and then die. Can someone please tell me what's worng with it? I appreciate any help at all.
Thank You

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  • pandababe124 Dec 23, 2008

    It;s a HP pavillion a705w. So a capacitor is like a power supply?

  • Anonymous Dec 30, 2008

    I have the same PC and Problem. Computer just won't work. LED on front blinks like some kinda Morse Code and LED on Power supply does the same. Power Problem or Processor/MoBo problem?

  • dwinningham Jan 12, 2009

    I have the blinking light, but after several tries it finally stays on and loads
    my PC. Mine also is a HP Pavilion a705w PC Desktop. Could it be in the switch. Please Help.

  • Anonymous Jan 16, 2009

    My HP PC was freezing up. I attempted restart a bunch of times and problem continued. I unplugged the power and replugged about half hour later. Blinking green light, won't restart.

    HARE BUTLER May 11, 2010

    lights fade out when PC's unplugged because of Capacitor Discharge . A capacitor is like a battery . It's designed to hold a specific charge for a particular lengh of time. when the capacitors are discharged , lights go out. That's a answer to Question 1 My question is Pavillion what ?? 5410 ?? what model pavillion ??

  • widowsmite77
    widowsmite77 Jan 15, 2012

    I had the same problem. This can actually be an issue where there is no defect, just a condition where the computer is locked up. If you disconnect the power supply connectors from the motherboard, and the power supply light now stays on solid, try the following.
    Reconnect all connectors. Unplug power and wait for all lights to turn off. Take out the four screws on the back that hold the power supply in place and lift the power supply out where you'll have good access. Get a blow dryer and direct high heat throughout the power supply vents for a good 3-5 minutes. The power supply housing should be hot to the touch. Plug the power cord back in.
    If the power supply light is now on solid, let the power supply cool down and try turning the computer on.
    (If the power supply hasn't cooled down enough, you may see a temporary startup of all the fans and then the power supply light will completely turn off.) Unplug the power, Let it cool down more and try again.
    I would repeat this blow dryer process again, if you don't get the desired results the first time. If you don't get good results from this then you unfortunately have a real defect somwhere. Hope this helps. It worked for me.



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If it is the power light on the front of the tower that slowly fades in and out, i've found that the most probable cause is some sort of hardware failure, such as with one tower i had, the DVD drive was faulty which causes it go into a sleep mode, sometimes removing the cmos battery can clear the problem, other times is where i remove the memory and turn the system on, it will beep because there's no memory installed, turn the system off again and let the system discharge of any power in it by unpluging the tower and press the power button, the power light will flash and go out, then replace the memory as long as you know the memory is good, that is thew way that i have found to reset the mother board and clear all faults.

Posted on Jan 16, 2012

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The blinking button is an error code. You need to call HP and they will help you determine what the code means and how to fix the problem.

Posted on Dec 20, 2008

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If Power supply light on or flashes
Perform the following steps, in order, until power is restored or it is determined that there is a hardware failure:
CAUTION: This product contains components that are easily damaged by ElectroStatic Discharge (ESD). To reduce the chance of ESD damage, work over a non-carpeted floor, use a static dissipative work surface (like a conductive foam pad), and wear an ESD wrist strap that is connected to a grounded surface, like the metal frame of a PC.

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.
NOTE: If the power supply fan makes an inconsistent grinding sound or stops and starts erratically, replace the power supply
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.
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.
NOTE: If you find the device that was causing the problem was a surge protector, resetting a breaker or fuse on the surge protector may fix the issue.
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.

Posted on Jan 12, 2009

  • Ganesan Chandraiah
    Ganesan Chandraiah Jan 12, 2009

    1. Check the power switch:

    a. 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.

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

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

    d. 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.

    e. 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.

    2. Find the defective part:

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

    b. 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.

    c. 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.
    NOTE: If an electrical storm or power surge has recently occurred, then it is more likely that the power supply, the modem, or motherboard is damaged and requires replacement. If the power supply was damaged due to power outage or storm, this may not be covered under the "act of nature" policy in the warranty statement. Refer to the warranty statement that came with your computer for more information.


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