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3 possibilities,AC adapter faulty,AC jack damaged or motherboard has died.If you had a battery that is charged testing for the motherboard and AC jack would be easy.1st thing I would do is take it to a shop and plug another AC adapter into it to troubleshoot for an adapter issue.And if your battery holds charge ask if they can charge it for you to check the other possibilities.Good Luck
Please 1. unplug the ac adapter, detach the main battery, press the power button for 15 seconds, plug in the ac adapter, and restart your laptop. If the problem persist: 2.unplug the ac adapter, detach the main battery, press the power button for 15 seconds, take out the hard drive, plug in the ac adapter, and restart your laptop. If the problem persist, then it means that the laptop motherboard is dying. Please read your laptop's service manual before you open the laptop's case/body.
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.
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.
Unplug the ac adapter. Keep ac adapter unplugged.
Remove the battery and keep the battery unplugged.
Hold the power button down for 15-20 seconds. (Nothing will appear on the display and none of the lights will light up.)
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).
Normally power on the notebook.
If the unit does not power on, remove the ac adapter and insert the battery into the system.
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.
No guarantee but you can try this. Remove the battery and unplug the AC adapter. Hold down power button for 30 seconds. Plug in AC adapter but leave battery out. Try to restart computer. If it starts, reinstall battery. It worked on a Gateway I was working on last week. Worth a try.
I've had problems with Dell AC adapters before. The usual cause that I've seen is that connection of the output cable from the adapter to the PC becomes intermittent. The units I had developed problems where the cable enters the adapter though it could happen at the connector itself too. If it is causing it to squeal and die then the cable is probably shorting out. You can test this theory by moving the cable around at those points and seeing if it dies or comes back on.
With my adapters, there was a strap that could be used to clamp the cable around the adapter. On my replacement unit adapter I quit using the strap and it worked okay after that.
1. Uninstall the battery pack.
2. Then, connect the AC adapter, we will try to use the power coming from the AC, then turn on your laptop.
3. Observe what will happen.
4. If still doesn't work, install again the battery, then connect the AC adapter, check if its going to work.
5. If not, perhaps you have a problem neither with the battery or the AC adapter.
I suggest that you bring your laptop to a service center. Good luck!
it may need to be left on charge for a while...
when u first boot by pressing power wait for a minute or so and press and hold power button til shut down then try reboot..also try boot from disk....need to distinguish whether motherboard or software issue.
There is no reset button on this model so I would suggest, removing the ac adapter and battery form the computer and hold down the power button for at least a min. From there reattach the AC ONLY, then try to power the unit on. If it turns on great wait for it to get to windows then slip the battery in. If it doesn't even attempt to power on, lets look at the Ac power adapter. Does it have a light on it? Is it warm to the touch? It very could be that the ac adapter may have died and the system's battery doesn't have enough power left to run the computer. If this scenario happens you may want ot call HP or take the computer to a local tech where they can test the adapter for you and determine if it is working. The last thing to check is the power pin in the notebook. IS it very loose when plugging in the adapter? If it is, that would indicate a physical problem that won't be resolved unless a tech looks at it. I hope this help.