Whenever my laptop is plugged in (NOT EVEN FOR LONG PERIODS OF TIME) the power cord adaptor (the part that attaches to the computer) the plastic that touches the metal portion inside the computer itself, melts, you smell burning plastic and the laptop stops thinking its plugged in...
Is the power adaptor made for the country you are living in? It's possible the plug you are plugging it into has a higher current than the plug was certified for. Have you tried plugging the laptop in in another location (like, in a different building)? You may just need to replace the adaptor, how old is it?
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Step 1: If your laptop charger seems broken, it's most likely because the battery will not charge. You plug in the cord, the lights come on, but the charging light doesn't change or blinks repeatedly. When you remove the power cord, the laptop shuts off instantly due to the depleted battery. There's more than one cause for this, and it's not always a broken charger.
Check the connection between the charger and the laptop. It should fit firmly in the DC jack without wiggling. If it is loose, use electrical tape to hold it in place so the charger can receive power. This is a temporary fix, however, because a faulty connection can create sparks and cause a fire or injury. A loose connection will just get worse over time, so have it sent to a DC jack specialist as soon as possible. Turn off the laptop and flip it upside down. Locate the latch that secures the battery and slide open. The battery should pop out; give it a tug if it doesn't. Apply a small amount of rubbing alcohol (Methylated Spirits)to the tip of a cotton swab and use it to clean the battery's connectors. Dirt can build up and interfere with the connection, giving the appearance of a broken charger. Let the alcohol dry completely and re-insert the battery. Slide the latch to secure it and plug in the power cord to test it. See if the laptop powers on with the charger only and battery removed. If it does, the battery is the likely culprit and should be replaced. If the charger is truly broken, the only thing to do is to replace it or the power cord attached to it. Look on the bottom and write down the part number. Call the laptop manufacturer for a replacement charger or search for the part number on eBay. If you purchase from anyone other than the original manufacturer, ask for genuine parts to reduce the possibility of problems. Troubleshoot Mag Safe adaptors http://support.apple.com/kb/ts1713
Try another Cord/charger first.( Beware of Cheap aftermarket cord/chargers/transformers!) The ticking , where is it comming from? Can you locate the origin of the ticking? The HDD, when it's bad, will try to spin-up and you will here a clicking/ticking. If the ticking is coming from the Cord/charger/transformer replace. I bought a spare, universal with plug adapters, for $50.00. Bad charger/transformers CAN be a fire hazzard, if left plug in unattended. Always unplug laptop when unattended, that is if you don't already.
A common weak spot on most laptops is the DC power jack. If someone trips on the wire while you have the power adaptor plugged into your laptop, chances are that the power jack will get damaged.
On most laptops the DC power jack is soldered directly to the motherboard and there are only three or four small pins holding it in place. Unfortunately that makes the power jack quite weak. Any sideways pulling of the DC power cord while attached to the laptop will usually dislodge at least one of these pins, breaking the solder around it. Modern laptops use quite a lot of power, from about 70W to 120W or even more. The bad electrical connection from the dislodged pin will cause sparks and heating that will eventually burn a hole through the motherboard and can even be a fire hazard.
The usual signs of that are:
The battery is not charging properly or stays at half charge despite that you have been using the power adaptor.
The screen flickers (the brightness is changing) while the power cord is plugged in. This is caused by the laptop switching between DC power (screen is brighter) and battery power (screen is dimmer).
The DC plug gets hot after a few minutes of use and may even smell of burning.
There are "scratching" sounds coming from the DC jack.
You need to take the unit apart and check/resolder the DC jack on the system board.
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yes it is possible, but the power adaptor itself could also be at blame. i suggest trying it in another laptop, or any device that uses the same power ratings as the adaptor, or even trying a different adaptor altogether on your notebook?
Keep in mind since you cleaned it out, only have the AC adaptor hooked up to rule the battery out. If the laptop stays on with only the ac adaptor hooked up and doesn't shut off then you know that the battery is faulty. If it still shuts off even with just the ac adaptor hooked up then it could be the ac adaptor.
Also check one more thing, with only the ac adaptor hooked up, wiggle the cord where it plugs into the laptop and see if the laptop shuts off, if it does then the dc jack on the motherboard is loose and needs to be resoldered back into place so it stays put.
when you plug in the power adaptor, does the light on the computer come on showing it has power before you press the button. If not , you need to take a voltmeter and check the DC voltage at the computer end of the adaptor while it is powered. If there is no power there, it is a problem with the cord. (this can be done yourself safely if you have access the a multimeter or you can run it down to your local radio shack and ask then to check it for you.
If the adaptor is ok , then id check where it plugs into the computer for looseness. cords get taken in & out of laptops a lot, and this area is VERY prone to getting damaged so to cause limmitted or no contact resulting in NO power.
once you've ruled out the cord , the computer power supply comes into suspect. This has airways through the back of your laptop (visable & hidden) that need to be clean (blown out) from time to time. If these get blocked with dirt, the laptop will run hot , shut down eventually and could cause damage to other hardware.
check these things and post again here, hopefully you dont have to go through everything before you find the issue.
Hope i was a help to you, let me know if i can assist you further.
You will constantly draw power from the outlet. Though it may not be as much draw as if you were running a device on it. Try picking up the AC adapter one day when not plugged in to the laptop. It still gets hot.
On another note,
When using AC power you should ALWAYS plug it into the back of the device before plugging it into the wall outlet to avoid excessive power surge.