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Power cord attachment into the back of computer seems worn, it wants to run off battery instead of recharging through power supply

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Either Have A Failing AC Adapter, Or A Failing DC Jack
you can test the AC Adapter using a multimeter (available at any home improvement center for $6)..
The DC Jack Would Need To Physically Be Checked To See If It's Faulty... which would intail removal of all parts down to the motherboard and visually inspect the DC Jack (the port where the Charger Cord Plugs into)

Remove The Battery... Plug AC Adapter Into Laptop.. Attempt To Power On....

Posted on Nov 15, 2009


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Posted on Jan 02, 2017


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My Compaq Presario SR5140NX will not turn on. No lights at all. Is there a way to test the power supply using a multitester? Roy

could be a lot of factors that would cause it to not power on. try to isolate them one at a time starting from the very obvious. often we may overlook something just because it seems too easy and obvious. i would suggest checking the power cord making sure it is securely attach to the power supply of your computer and to a verified working power outlet. if by any chance you are using a surge protector or UPS, try to disconnect them temporarily and directly plug the power cord to a working wall outlet. if you have an extra power cord, try testing it. a faulty cord will cut the power flow from the outlet to your unit. next, remove all attached devices including mouse and keyboard to the tower/unit to make sure none of the external devices is causing a possible short to the system. another thing to try as you said is to test your power supply. unplug the computer from the wall outlet, press the power button for about 10 to 15 seconds just to drain any residual power. Then disconnect all cables/connectors of the power supply from the mainboard/motherboard and other internal devices you have. This is to isolate it from the rest of the computer. You can then use your short the pin 15/16 from the 20/24 pin connector using a paper clip or a piece of wire to allow you to see if the power supply fan will spin which will tell if it is at least working or generating power. from there, you can use a multi-meter to test it. Instead of laying down all the steps, it may help checking some guides online on how to perform a tester. you may check this one as it has some images that may help you go through the process.
if you have isolated that your power supply is faulty, you will need to get a replacement. if you have confirmed it works, next thing to try is to minimize the internal devices on the computer and reset the cmos jumper. check the manual for your computer for the reset jumper settings/pins. be sure to remove the cmos battery then set the jumper settings, and plug the 12 volts or 20/24 pin connector from the power supply back to the motherboard. plug the power supply to an outlet and see if the motherboard will have any light, will generate any beep or if the fans will spin. if so, allow it for a few seconds, then turn off the power supply switch or unplug it if it has no switch. adjust the reset jumper back, put the cmos battery back then try to switch the power supply again. if it fails to power on, most likely a replacement motherboard is needed. on the other hand, if it powers up, then try to connect internal devices back to the motherboard and power supply testing the power each time to see if any of the components is actually shorting out the unit until you identify what may need to be replaced. if you get lucky, resetting the cmos jumper alone may fix the system without the need to replace anything. hope this helps. good day

Feb 20, 2015 | Compaq Computers & Internet

1 Answer

How do i switch power in a 1990 terry 5th wheel to the power cord instead of the battery?

This is the car and truck section - but I would think there would be a master switch unless the system runs off the battery circuit and the power cord uses a charger or converter to recharge the battery.
Do you have a panel that shows battery voltage ?

Sep 05, 2012 | Cars & Trucks

1 Answer

Can't identify power source warning

Your AC Adapter Power Cord is bad based on what you are telling in your request for help. You need to replace the AC Adapter Power Cord.

You can further isolate and verify by the following steps:

If you remove the battery, and plug in the power cord, but the computer will not boot up or work, then the power cord is bad.

If you have them both plugged in and you are running off the battery then the power cord is bad and it is not charging the battery. Eventually your laptop is not going to power on because the battery will be drained and cannot be recharged until you get a working Power Cord.

May 15, 2012 | Computers & Internet

1 Answer

Not powering on

Computers don't power on for one of the following reasons.
1. Bad Power Cord
2. Bad Power Supply that the Power Cord Plugs Into on Desktops but on Laptops it's call the Internal DC Power Jack
3. Bad Motherboard.
If you see no lights at all when you plug in the power cord and press the power switch then it's a problem with one of the 3 above.

Sometimes you can have something as simple as static charge buildup that is causing the computer not to start. Here is how to eliminate the static charge problem. Remove the Power Cord from the computer or Laptop. If you have a laptop also remove the Battery from the laptop. Press and hold the Power Button for about 30 seconds. After 30 seconds, plug the power cord back in (don't plug the battery in if it's a laptop) and see if it boots. If it's a laptop and it boots then you can plug the battery back in so that it can start recharging.

Mar 14, 2012 | Toshiba Computers & Internet

1 Answer

Power cord pluged in, turn on computer entered password, screen went black, power on button blinks green instead of steady on, wont do nothing else, what happened, what do i do now?

Unplug the power cord. Remove the battery. Press and hold the power button for 60 seconds then release. Plug the power cord back in but leave the battery out and try to turn it on now. If it comes on you can put your battery back in. If it still does not come on you may need a new power supply/ adapter.

Apr 06, 2011 | Acer Computers & Internet

1 Answer

My hp pavillion dv5t-1000 power cord not working

Test your voltage on your power supply...There should be a voltage amount on the sticker on your power supply telling the output.Make sure yours is putting out the right amount.If this test good,your probally looking at a bad dc jack.Jacks need to be checked by a certified repair person.....Goodluck......If this is helpful ...Be so kind as to give a testimonial.....Thank you

Apr 09, 2010 | HP Pavillion DV6227 Notebook

1 Answer

My MPC t2300 laptop wom't turn on.

The Transport T2300 has an internal battery that will run the laptop for several minutes after the main battery goes dead. This feature allows you to save your work and shut down safely. If you run the laptop until both batteries are dead, even a brand new battery can't start the unit again. You have to follow this procedure:
1.Unplug power cord

2. Remove any attached periphal components including the cd rom and/or floppy disk module if you have one. Both remove with a push button switch located on the bottom of the unit.

3. Plug in power cord and charge the unit for a minimum of 24 hours straight. 30 hours is better. This whole time will be spent slowly recharging the internal back up battery.

4. Once that is done, unplug power cord again and reinstall any floppy/cd drives. Plug power cord back in now and charge for at least 24 hours again.

If your backup battery is dead, you can't charge the main battery or turn the unit on. The longer you charge, the better. We had one unit here that had to be on the initial battery backup for 72 hours before it finally took hold. Then, one overnight recharge on the regular battery and all was well.
If you need drivers or manuals for the 2300, all are available on cd at for around $9.50 including shipping, handling, and owners manual

Apr 11, 2009 | MPC Computers TransPort T2300 Notebook

1 Answer

HP Pavilion dv2020us laptop battery won't charge

How is your power supply? does it seem like you have to wiggle your cord that connects to computer to make it recieve power?...Many laptops power supply become loose over time form moving the cord around..when it does, the battery has a hard time getting electric power to recharge. Also, you my have other problems with your lithium internal battery that powers your cmos.

Check to see if your power supply is loose and go from there. the power supply is the little hole where you connect the cord to the laptop.

let me know what the status is

Apr 10, 2009 | HP Pavilion dv6000z Notebook

2 Answers

Eee PC 2G power supply

Why don't you contact the supplier and get a replacement. It must still be within its 1 year warranty period?

Aug 14, 2008 | ASUS Eee 4G Notebook

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