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Will not power up, ac power light is lit but main power button will not turn pc on

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Probably have a loose wire. i'd suggest removing the battery, taking the back cover off and look for a loose wire. however, if your still in warranty send it for repair.

Posted on May 27, 2010

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Posted on Jan 02, 2017

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My lenovo G550 appears not to charge when the charger is plugged in despite turning the mains power on and off to see if power is getting though and the blue neon light showing on the mains...


Hi m529,

I see you are having issues with you G550 charging.

You mentioned that the light on the charger is lit up but then it suddenly switches Off, and you also mentioned that the charge still has a light but the power is somewhat low despite of a fully lit up charger Light.

Have you tried draining the power from the system?

  • Remove the battery and the Charger or AC Adapter as well call it from the G550 then press and hold down the power button for 10-15 seconds to drain power from the system motherboard.
  • Once drained connect the AC adapter but do not connect the battery yet, then turn the Laptop ON to see if the system will power ON using the AC adapter/Charger if it powers up then there is no problem with the AC adapter/charger.
  • After testing the AC adapter if it is working power down the Laptop doing a normal shut down.
  • Once shut down or turned Off insert the Battery back in the Laptop then turn the Laptop ON using the battery only without the AC adapter/charger see if the system will turn ON using the Battery only.
  • If the Laptop powers On using the battery alone with out the AC adapter then the battery is most likely working as well on the issue.
  • Now power down the Laptop then connect the AC adapter to the Laptop with the Battery in the Laptop as well then turn the system ON again see if the problem will Occur again having the battery and the AC adapter/charger if the Problem happens with both Battery and AC adapter on the Laptop then the problem is the Motherboard, most probably the motherboard is having issues relaying power from the AC adapter to the battery and may be sent to the Depot for repairs.
I suggest that you call Lenovo for further information about your system, if you still have warranty and is still in the one year period then your system will be covered for any repairs needed - you can call @ 1 877 453 6686 for troubleshooting, you will be asked for a serial number Located underneath the Laptop on a small white sticker that states s/n meaning serial number.

I hope that this Helps.

Have a nice day,

mvincentc

Jun 18, 2011 | Lenovo G550 PC Notebook

1 Answer

Cannot turn on my laptop only the start button light turns on but no screen display and a few noises help


This is only the first of many things you may need to do to determine the fault. But it is a process for determining the exact cause.


Make sure the ac adapter is correctly plugged into the notebook and into the power cord.


If everything is plugged in correctly and it still will not power on, follow these steps to complete a 'power reset' of the notebook.

  1. Unplug the ac adapter. Keep ac adapter unplugged.
  2. Remove the battery and keep the battery unplugged.
  3. Hold the power button down for 15-20 seconds. (Nothing will appear on the display and none of the lights will light up.)
  4. Release the power button and plug in the ac adapter ONLY. (Please note that a power indicator light should be lit on the ac adapter when it is plugged in).
  5. Normally power on the notebook.
  6. If the unit does not power on, remove the ac adapter and insert the battery into the system.
  7. Plug the ac adapter back into the system, the battery charging indicator light will light up.
    If the battery charging indicator light does not light up, the ac adapter may not be providing proper power to the unit, and may need to be replaced.

May 15, 2011 | Acer Aspire 5500 5570-2609 Laptop

1 Answer

Computer locked as though in sleep mode - screen dark grey colour. Power light lit and 'moon' illuminated. Any ideas hoe to unlock?


Remove the battery and mains and hold the power button down for 30-60 secs, then replace battery and mains. It should now hopefully turn on.

Feb 21, 2011 | MSI Microstar CR500438US Notebook PC

1 Answer

Hangs on startup no video, no audio power light and harddrive access light are lit as are numlock, caps lock, and scroll lock.


remove the ac adapter and battery then press the power button for about 15seconds then reconnect the power sources and turn on the system. if it still doesnt turn on correctly, reseat the memory.

Dec 03, 2009 | Sony VAIO VGN-N320E Notebook

2 Answers

Powered off while using. now will not power on. tech @ bestbuy sed was bad motherboard


Take out the battery and only hook up the ac adapter. Make sure if your ac adapter has a green light that its lit. If its not lit then that means bad ac adapter.

If your laptop doesn't turn on then next step is to take out the hard drive and the dvd drive.


Try turning on the laptop again and if it doesn't turn on then that means for sure its a bad motherboard.

Dec 03, 2009 | Acer Aspire 4520-5803 Laptop

1 Answer

DELL Precision M65- cannot turn on. Even take off batt then turn ON, or using adaptor without battery still cannot turn ON. The LED light is ON but no visual/screen. Please help. Many thanks...


Hi,
Verify the AC power adapter displays a solid green or blue light. Older Latitude™ C Series laptop computer AC adapters may not have a light.
Run the diagnostics on the system as follows , connect both the battery and the Ac adapter before running the diagnostics

  1. Ensure the system is powered off.
  2. Remove all external peripherals.
  3. Press and hold the <Fn> key on the keyboard.
  4. Continue to hold the <Fn> key while pressing the power button.
  5. Release both buttons.
  6. Note which lock LEDs are lit (lock LEDS are next to the power button)
And proceed with the troubleshooting steps listed below
http://tinyurl.com/m3k22x

Thanks for using Fixya
Proton

Jul 13, 2009 | HP Pavilion dv6000z Notebook

2 Answers

Acer won't turn on ,no battery being used only ac power


I have the feeling that the battery has to be in place to allow the AC power to be transferred to the mother board

Jul 06, 2009 | E-Machines eMachines Desktop PC

1 Answer

No response


First follow procedure to try to reset the power.
  1. Unplug the ac adapter. Keep ac adapter unplugged.
  2. Remove the battery and keep the battery unplugged.
  3. Hold the power button down for 15-20 seconds. (Nothing will appear on the display and none of the lights will light up.)
  4. Release the power button and plug in the ac adapter ONLY. (Please note that a power indicator light should be lit on the ac adapter when it is plugged in).
  5. Normally power on the notebook.
  6. If the unit does not power on, remove the ac adapter and insert the battery into the system.
  7. Plug the ac adapter back into the system, the battery charging indicator light will light up.
    If the battery charging indicator light does not light up, the ac adapter may not be providing proper power to the unit, and may need to be replaced.

May 23, 2009 | Acer Computers & Internet

1 Answer

Dv6120us power button dont work


None of the buttons will work untill the power is turned on and no sound will be heard.
You might want to try charging the battery by connecting the AC adapter to the laptop and plugging it into the wall outlet.
With the AC adapter connected, try powering up the laptop.
I hope this helps.
Good Luck.

Mar 25, 2009 | HP Computers & Internet

1 Answer

Screen went black


plz try by resiting the ram, if the problem persist then you have problem in display adapter,send it to the vendor from whom you have bought

May 16, 2008 | Compaq Presario 700 470024-192 Notebook

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