Battery not charging if connector moved

posted in: Battery charging, DC jack | 95

This laptop has a power problem. The battery stops charging when I move the AC adapter connector inside the jack. When the connector or power cord moved, the battery charge LED light on the front goes on and off.

Let’s troubleshoot this problem and figure out if this is DC jack related failure or the AC adapter is defective.



Wiggle adapter power cord

First of all, I tested the laptop with the battery removed. It turns on and runs properly from the AC adapter but as soon as I start moving the connector inside the jack the laptop shuts off and it loses power immediately.

If you have a problem like that, most likely it’s related to the AC power adapter or the DC jack.

Test power plug

First of all, I tested the adapter with a voltmeter. The power didn’t cut off no matter how badly I wiggled the cord. I was reading 15.45VDC all the time. It helped me to make a conlcusion that there is nothing wrong with the adapter connector or cord and most likely there is a problem with with the power socket inside the laptop.

The next step was the DC jack inside the laptop.

DC-IN harness

In order to access the jack I had to disassemble the laptop and remove the top cover assembly with the display.

You can find disassembly instructions for most laptops in their service manuals.

Power ON

In my case the DC jack was attached to a cable and I easily disconnected it from the motherboard. I tested it with the voltmeter as it shown on the following picture.

When the adapter cord didn’t move, I was reading 15.45VDC.

But as soon as I started wiggle it, the voltage dropped to 0VDC.

Power OFF

The DC jack harness is defective and had to be replaced and the new one fixed the problem.

Replace DC-IN power harness

In some models the DC jack is soldered to the motherboard.
If the battery stops charging when you move the adapter plug, test the AC adapter first. If it pass test, replace the jack.

Laptop notebook power jack



95 Responses

  1. DC jack harpness is defative and had replaced and the one fixed the proble solution

  2. @ Benjipally,

    Plz my hp iz nt displaying on screen. Any sol.

    1. What is your laptop model?
    2. Does your laptop turn on at all? Any lights when you push on the power button?
    3. Take a closer look at the screen. Is it completely blank or you can see a dim image?

  3. Benjipally

    Plz my hp iz nt displaying on screen. Any sol.

  4. William Adams

    I would like to have the schematic for my Presario m2000 cto laptop. I have a charging problem and need to fix it. I have replaced the power supply, battery and the power jack and it still will not charge. If I use the charger and battery in my Pavilion DV5000 which uses the same battery and power supply it will charge to 100%. The M2000 will run with the ac or battery, it just will not charge the battery. Compaq Presario M2000 s/n cnf5170swb p/n pq660av. Please advise as to where I may obtain the schematic.
    Bill WD8OSJ

  5. Paul Orok Ephraim

    I am using Acer aspire 5920 Intel core 2 duo.pls I will love to know may be is it good to change the ram to a higher one and the hardisk.pls it important

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