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Have you checked your Cord, Verify that the cord is good by using a computer like your, make sure the power specs are the same. Or get a cord and try it with your laptop. Perhaps the jack is damaged in your laptop, pulled, yanked, tugged, you get the idea. If so replace the AC jack. Bad Battery? How old, mine lasted 4 years.
Did you check the DC Jack where the Power Cord plugs into the laptop? If it is bad (wiggly or loose) then the laptop will not power on. Take an ink pen and put it where the power cord would plug into the laptop and see if the jack wiggles or is broken. If so, that's your problem.
The old power cord might be some good if the problem is with the DC Power Jack.
Sounds like your DC Power Jack is bad or broken. The DC Power Jack is where the power cord plugs into the laptop? Most times it get damaged by too much stress on it such as sitting in bed with the laptop, or putting the laptop in the laptop bag with the power cord still plugged in.
Take an ink pen and put it into where the Power Cord normally plugs into the laptop. If the pin inside the DC Jack is loose or wiggles then the jack is probably bad. Sometimes the jack can be completely burned out and you can smell smoke .
If the internal DC Power Jack is loose, you will have totake the laptop apart to repair it. The DC Power Jack is on themotherboard and most times it is soldered to the motherboard. That meansyou will have to desolder the old one and solder a new one in it's place. Sometimes the dc power jack sits in a slot between the bottom case and palmrestwhich hold it in place and has a cable harness that plugs into the motherboard.
Remove the main battery and power supply, wait a few minutes to get rid of any residual charge. Now plug the power supply back in and power up, If no change! the problem might be the DC jack in the laptop, make sure the power supply is plugged in, now put your thumb around the plug and gently bend it sideways as you do so press the power repeatedly to see it you can power up, if yes! the DC jack needs to be resold-ed or replaced on the motherboard, if no! remove the hard drive, if no! swap out the ram one at a time, if you still do not get results the likely culprit is the motherboard.
If you plugged in the ac adapter, and you still get no power and cannot turn it on, the first thing to check is the AC adapter. Get a voltage meter, set it to 200 DC, put the positive on the inside and the ground on the outside. Unless you have a highpower alienware laptop, it should read +/- 20 V, most likely 19.xx. If your AC adapter is good, then the DC jack, what the adapter plugs into, is bad. In this case, the laptop will have to be disassembled, the mother boared removed, the old DC jack de-soldered and taken off, and a new DC jack soldered on. You would really need to take it to a qualified techninician at a shop to di it.
Sounds Like From Your Description That You Need Your DC Jack Repaired/Replaced..
THe DC Jack Is the Port where Your AC Adapter Plug Plugs into on the laptop.... THis can be proprietary or non proprietary.... But Either way, the Old Faulty Jack Needs To Be Desoldered and Removed, THe Board Cleaned and a New DC Jack Soldered On.. You Will Then Be able To Power On Laptop With AC Charger and Will again Be Able To CHarge The Battery..
If the old one works you have another power supply or wrong one. Check the properties of your power supply.
Related to your issue you also may consider this:
1.- Computer AC / DC cable is bad not allowing the computer battery to charge. 2.- Battery is bad. 3.- Battery charger board is bad.
Solutions: 1.- Computer AC / DC cable is bad not allowing the computer battery to charge
Verify that the AC and or DC cable is not bad by testing the computer only with the power plug connected and the battery out of the laptop. 2.- Battery is bad
It is possible that if the power plug is good that the computer battery is bad. Leave the computer connected to the power with the battery connected in the computer for at least one hour; if the battery does not charge, consider having the battery and/or the laptop serviced or repaired.
If the computer and/or battery is not in warranty consider just replacing the battery as it is very likely that it is just a bad battery. 3.- Battery charger board is bad
If the battery has been replaced or an alternate battery from an alternate identical laptop does not work in the computer, it is likely that the power or charger board within the laptop is bad. It is recommended that the laptop be serviced or repaired.
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