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Computer will not switch on, light at back below mains connection flashing

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  • Anonymous Dec 29, 2008

    once pc is turned off it is problem of switch on for 30min after the time it is normally operating.......some times switch off after few hours

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Im guessing that you have a problem with your PSU (Power supply) If you hear no noise at all when you try to power up your PC then i would take it to your nearest Sole trader and ask them to fit a new one i would imagine no more than 30GBP to fix depending on whether he sees you coming

Good luck

Carl

Posted on Dec 01, 2008

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How to fix my Dell tower the power on goes into the orange blinking light and won't power on took the green light


To help you troubleshoot the issue, first of all it is recommended to check all the power connections to the computer are connected properly and power switched are turned ON.
If issue persists, please follow the steps as given below:
- Turn of all the Power Connections.
- You remove the CMOS battery for at least 5 minutes, remove the SMPS (Switch Mode Power Supply) connector that is attached to the motherboard and reconnect it back.
- Now turn ON all the Power connections of the computer and check if computer is working fine.

If issue persists, you may also check if the computer is under warranty and it can be repair or replaced from Dell:
http://www.dell.com/support/home/us/en/19/Products/?app=warranty

Also please find the link given below to contact Dell Support Center for further assistance:
http://www.dell.com/support/Contents/in/en/inlca1/category/Contact-Information?~ck=mn

GuruAid.com

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COMPUTER DOSENT TURN ON JUST GREEN LIGHT FLASHES


Dear Elvira,
You have to disconnet your power supply from the mains by pulling out power cord then the open the side pan of your cabinet and locate the ram.remove the ram and resit it in another slot. then connect your power cord to the power supply of your pc then switch on.
If the problem is not solved then again remove the power cord and remove the cmos battery from the motherboard and wait for 20 seconds,then put it back.and power on the system. if the problem is not solved then try with another powe supply.still problem is there then your motherboard may be bad.you have to replace the motherboard.

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Computer won't turn on. Blue flashing light.


The blue light blinking indicated that your processor if faulty.So please check your processor. Take it to tech department for new processor.
I hope this solution has been helpful.

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Hello have a problem with tv Model is: lg


http://lgknowledgebase.com/kb/index.php?View=entry&EntryID=6281

The above link goes to lg's website describing the red flashing light where the power switch is, and

another switch down below which can turn that light off.

Try switching that other switch below off so the light turns off. Then, switch it back on.

If that doesn't work, then service should be scheduled for this discontinued model.

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Jun 29, 2010 | Compaq Presario 5000 PC Desktop

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Won't turn on


best thing i can suggest here is:

get another motherboard

when you put the new motherboard in, you will need to repair your windows installation in order for the computer to work with the new motherboard as Windows configures the hardware on the board, when you install Windows, that installation will only work for that board, if you upgrade, u just need to repair

sounds like one of the pins is slightly corroded or one of the circuits is about to go

tell us how you go with this

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I have an HP Pavilion a384x. It will not turn on


First with the computer turned off make sure the switch on the power supply is set to 115v.

If you turn the computer back on and you still get a flashing green light on the back of the power supply and a constant light on the front of the computer with no video, then try replacing the power supply with either a new one or a known working good one.

If that doesn't do it then it has to be the motherboard at that point.

Keep in mind normally on those power supplies, the green light should be constant. So it has to be either the power supply is bad or the moterboard is bad and you'll know when you put a new or known good working power supply in the computer.



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Power button just flashes will no turn off AND nothing on the screen


On back of the computer is a on off switch for the power supply, or unplug the computer for one minute. Turn the switch back on, or plug the computer back in and try to turn it on.

Apr 20, 2009 | PC Desktops

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When comp pluged in just a green flashing light


If you are sure that the 110 volt power is coming into the computer then the most likely problem is that th epower supply died. Obtain a new one of the same or larger wattagge as the one you are replacing . It does nto have to come from the manufacture of the computer. 

Nov 26, 2008 | Compaq Presario SR1000T (568657) PC...

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Hard drive fan stop working computer stop, yes I have power but but,computer will not tyrn on PC will not power up when I woke up this morning and went to use it the green light on the front was flashing...


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. Figure 4: Voltage selector switch c00517964.jpg 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.
  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 c00517968.jpg
    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.

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