Tip & How-To about Computers & Internet

Laptop computer won't power on: Troubleshooting.

When a laptop does not power on it can be a variety of issues: the battery, the power cord, or the dc input jack.

Keep in mind, this is purely for a computer that does not power on. A computer that turns on and immediately back off or turns on but fails to load is a completely separate issue.

Please follow the steps below hopefully determine the nature of your laptop power issue.

1. First we can eliminate the battery from the picture by removing it and testing to see if the situation is the same. Please remove the battery, insert the power cable to the wall and the laptop and try powering on.

  • If this works: Use compressed air to blow out the contacts on the battery, reinsert and try powering on again. If it does not work the battery is most likely defective.
  • If removing the battery does not work move on to the next step.
2. Next would be to test the ac adapter (power cord). This can be beyond some peoples' level of comfort. If this is the case please visit a reputable repair shop to have further testing performed. This step will require a power testing device referred to as a multimeter or a volt-meter. Plug the ac adapter into the wall, and connect on lead of the multimeter to the outside of end that could stick into the laptop. The other lead must be touching the inside of the tip of the power cord (again, the part that would stick into the laptop)
The power output of a standard laptop cable should be 18.5 - 19.5 volts.
  • If the cable is outputting the proper voltage, the issue lies within the computer and a trip to the repair shop is most likely necessary. Most times this is a simple repair (<$100) however it can become costly ranging to $300-$400 if a new mother board is involved. There is no way to tell until the unit has been pulled open.
  • If the voltage is not within the correct range (for a normal laptop; netbooks will be much lower and the proper value is listed on the brick of the adapter) a new adapter is necessary and can be purchased directly from the MFG. Also, universal adapters are often sold in computer shops and electronic stores.
Hope this helped weed out some laptop power issues.
Thanks,
-halfs

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2 Answers

laptop battery light won't stay on


The battery might be dead. Batteries only have a useful life and after that they have to be replaced.

Does your laptop work ok off the AC Adapter Power Cord? If so, your battery is dead and your power cord is good. If the laptop does not work off the Power Cord then either your Power Cord is bad or the DC Power Jack where the power cord plugs into the laptop is bad. In either case a good battery will not charge if the power cord or the DC Jack is bad.

Check your DC Power Jack which is where the power cord plugs into the compute. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

Jun 03, 2012 | Toshiba Satellite Computers & Internet

1 Answer

evertek e500 not chargijng


Does the laptop work with just the power cord plugged in? If so, that means your power cord is ok and if your battery is not taking a charge then the battery is dead. Batteries only have a useful life, then they have to be replaced.

If you laptop is having issues staying on or booting up with the power cord then either your power cord is bad or the DC Power Jack where the power cord plugs into the laptop is bad. Either one will cause the battery not to charge.

Maybe your DC Power Jack which is where the power cord plugs into the computer is bad. Take an ink pen and push the tip inside the jack and see if the little pin wiggles, if so the jack is bad. You'll have to take the laptop apart to fix it. Most times it is soldered onto the motherboard, so you will have to desolder the old and solder a new one.

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1 Answer

R60 Wont Charge


What's the make and model of your laptop? Most times the flashing lights will tell what the issue is.

If the laptop will not boot up so you can use it then the things below applies.

Sounds like your power cord is bad. Or the DC Jack is not soldered on good. Just because the power cord is new does not mean it works. Some Power Cords have a little green light on the adapter to show that it is plugged into the wall and getting power, check yours.

Anything ever post to the screen when you hit the power button? Do the fans start up, the hard drive spins? If not, maybe your power cord has enough power to emit a light but not enough to start the fan or disk drive.

If it's not the power cord or dc jack, then you have a Memory or Video Card issue.

OK after reading your post a 2nd time I think your only issue is that the battery is not charging, correct? If that is true the things below applies:

Either the battery is bad or the power cord is bad. Just because they are new don't mean they work. See if the Adapter portion of the power cord has a green indicator light that comes on when you plug it to an outlet. If it does, and that light is not on the power cord has issues. Also I hope you did not buy one of those one size fits all power cords from the big box stores where the end has a bag of different interchangable parts until you find one that fits into the laptop. If so, buy a power cord off ebay that is made for your laptop.

The battery might be bad and not hold a charge. I have seen new batteries that did not work.

May 16, 2012 | Computers & Internet

1 Answer

My Eee 4g surf netbook won't charge at all. Upon turning it on, it runs for a second, then shuts off due to a lack of battery power. The charge cable's light is also not turning, so that may


I think your DC Power Jack is bad. The DC Power Jack is where the power cord plugs into the laptop. If it is bad, then a good power cord cannot charge the battery, nor can the laptop turn on once the battery is drained.

You say it smelled burnt, that might mean it took a power surge. I always tell people that before your plug the power cord into the electrical outlet on the wall to remove the other end of the cord from the laptop. That way if you get a power surge you will only damage the power cord and not the dc power jack or motherboard.

Anyway, take an ink pen and push it into the dc power jack and see if there is some movement. The little pin or the casing of the jack should not wiggle.

The DC Jack is soldered onto the motherboard. To replace it you will have to take the laptop apart, desolder the old dc jack and solder a new jack onto the board. Sometimes the DC Jack sits in a slot rather than being soldered. The palmrest and bottom case helps to keep it in place. This type of DC Jack usually has a cable harness that plugs into the motherboard.

Apr 02, 2012 | ASUS Eee 4G Notebook

1 Answer

gateway kav60 not charging. i have to wiggle the cord and sometimes it refuses to charge.


I guess you've got a broken laptop power dc jack or power cable.


Symptoms of a broken Laptop DC power jack:


- The laptop only operates when you hold the DC power plug in a certain direction (DC jack is broken or loose).
- The laptop only runs on battery power (no power is getting through the DC jack).
- The laptop gets no power at all.
- The laptop will not charge the battery.
- The laptop switches from AC power to battery power intermittently due to a loose or broken power jack.
- The laptop suddenly shuts off.
- The DC jack may feel loose.
- Sparks come out of the back of the laptop when you insert the power plug into the DC jack.

Apr 21, 2011 | Lifetime Gateway KAV60 Replacement Laptop...

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