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Computer does not turn on

All the power plugs are plugged in, the back LED of the computer box(if that's what it's called) is flashing green and my computer won't turn on.my comp is hp pavillion

before this all happened my mother got lazy and pulled out the main plug but everything else was working fine except for computer box thingy. the monitor works fine. My computer was working fine until I unplugged it to move and clean it. Now it won't turn on at all. Any suggesstions?

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  • 1,124 Answers

Check the switch of the power supply at the back (black button) First
If the power supply fan doesn't work or cpu fan doesn't work
Replace the power supply.

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Posted on Oct 16, 2008

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hi, okay you got to be careful here, it's sounds like the power supply has called it a day, disconnect from the mains take the side panel off and get sniffling can you smell a burn smell , no , now pull the power leads from the hard disk and DVD drive if fitted now removing anything that could cause a short on the board , turn it on, do you get video display ?


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Keep me updated please.


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Try to power drain it. Unplug all the power related devices that are connected, like a monitor data cable or external printer, just unplug all the cables in the back after you shut down your computer, press the power switch of your computer and keep it pressed for about 45 secs, release it, plug everything back and check it if its working. As well double check if that particular socket is usable, plug something else in to see if its working.

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Hi the power went out in our office, and now our pavillion a600n won't turn on. The green led on the back is flashing and making a clicking sound. What to do?


Unplug the computer and let is sit, then plug it back in. If that doesn't work check to see if there is a reset button on the back (on the power supply where the power cable is going on) if there is press it. If that doesn't work, then try plugging it in to a different wall jack (if it is connected to an uninterpretable power supply, then that could be the problem.) Best Wishes!

Mar 28, 2011 | HP Pavilion a600n PC Desktop

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Emachines model 4026. We had a short power cut. The computer went off and now will not start. At the back of the machine close to the power plug is a round green L.E.D. light. This is now constantly...


it looks like the power supply went bad, before try to do something else. I would recomend you to get you powe supply (part #) and order a new one . it is really simple to install it. the power supply is on the back of the computer where you see the green L.E.D light it is what gives power to the whole system.

follow this link and watch the video to know how to install it. http://video.about.com/pcsupport/powersupply.htm

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I plugged in my tower and i heard a loud high pitch beeping sound the green led light in the back was on but the power button turns green and the green led light in the back turned off there is no signal...


the green led light is it beside the network cable connector. if it is so, then it is always meant to be like that when you power up your computer. it is not something serious and it is normal.

Aug 18, 2010 | HP Pavilion 533w (P9859AR#ABA) PC Desktop

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Green light flashing on back of unit near power cord also green light flashing on motherboard near power supply plug in.


I would suggest trying to replace the power supply. If that does not fix the issue, i would need to hear more about the computer.

May 06, 2009 | Sony VAIO VGC-RB40 PC Desktop

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Fast green blink


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.
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.

4. Plug in the power cord and test to see if the computer can turn on. If not, continue using these steps.
5. 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.
6. 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.
8. Remove all attached devices except for keyboard, mouse, and monitor.
9. 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.
10. 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.
11. With the power cord disconnected, remove the case or side panel.
  • Follow the wires from the power button on the front of the computer to their connection on the motherboard.
  • 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.
  • 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.
12. Find the defective part:
  • With the power cord disconnected, remove the case or side panel.
  • 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.
  • Replace the side panel, plug in the power cord, and examine the light on the back of the power supply:

13. 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.

14. 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.

15. 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.

Apr 11, 2009 | HP Pavilion a340n (DQ099AABA) PC Desktop

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Green light flashing after shutting down computer to relocate office.


if its by the power button the led just indicates power after u have removed its source and reconnected it........this is normal nothing to worry about.

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Computer does not turn on


welcome to fixya

could you explain what a computer box thingy is?
you could of blown the power supply or you could of messed up the video card in the computer when you hit the button does the computer run at all

if not then the power supply got fried if it does then the unplug everything and replug back in after 10min and try again if not then tyou might need to take to a sevice place

hope this helps out have a good day

Aug 04, 2008 | HP Media Center m7250n (ED842AA) PC...

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Powerbutton flashing yellow


If the main power button LED is flashing or solid yellow, this could indicate a hardware problem.

 

Was it running good before?

 

Are the diagnostic LED lights all green?

 

Here is what dell says:

 

If the power light is blinking amber  —

 The computer is receiving electrical power, but an internal power problem might exist.

  • Ensure that the voltage selection switch is set to match the AC power at your location (if applicable).
  • Ensure that the processor power cable is securely connected to the system board.

Do you remember what the BSOD said?

Oct 22, 2007 | Dell OptiPlex GX620 PC Desktop

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