I have problems with charging my laptop, i'm thinking it may be the jack, can this be repaired?

I think it is because of the loose dc jack. So
You need to get the DC Power Jack Either Repaired or replaced...this is the "female" port where your AC Power cord plugs into.. To Repair the current DC Jack...First you'll need to look closely at the Positive posts to see that they are not broken.. If visibally ok.. then you can look at the Solder Connections.. they will need to first be Desoldered.. Cleaned, then Resoldered back in place....
http://www.chargerbuy.com/laptop-ac-adapter/samsung-compatibility.html

The DC Jack is the socket into which the power cable plugs into your notebook. If it has come loose the the solder points connecting the jack to the motherboard have broken contact and that is why the notebook is not charging. A loose DC jack is not suitable for DIY repair unless you are experienced in internal notebook repairs and have all the right equipment.
The only way to get this fault repaired is for a professional notebook repair technician to completely disassemble the notebook and then either re-solder the original jack back into place or install and solder in a new replacement jack before reassembling the notebook. Because of the skill and time it takes to disassemble repair and reassemble a notebook, repairing a loose DC jack can be expensive, but if you look around you should be able to find an experienced notebook repair center that will do it for $50-$75 and give you a warranty as well.
A DC jack often become loose if it is allowed to directly bear the deadweight of the heavy AC/DC Adapter on the power cable or the cable catches on something wile connected to the notebook. the AC/DC Adapter should lie full weight on the floor during charging. If the cable is not long enough for the heavy AC/DC Adapter to reach the floor, then it should be lifted it up and placed on the desk or table beside the notebook. Any cable length problems should be solved by using a surge-protected power extension cable. Also, a notebook should never be carried around when its power cable is attached to it.

mostherboard fault - electronics can help you. It can repair!

Problem description: The battery charges only when the laptop turned off. The battery charge LED lights up as normal and the battery gets charged to 100% while the laptop is off.
When the laptop is turned on, the battery charge LED goes off even if the adapter is still plugged in.
Possible cause: 1. AC power adapter failure.
2. Battery failure.
3. Broken/loose power jack.
4. Motherboard failure.
Possible troubleshooting steps and repair solution: 1. This problem could be related to a faulty AC power adapter. It's possible that the AC adapter doesn't provide enough power when plugged into the laptop. To find out if this is your problem, you'll have to test the laptop with another working adapter.Replace the adapter if needed.
2. There is a slight chance that you have bad battery. Test the laptop with a know good battery and replace the faulty one if needed.
3. The battery charge problem could be related to the power jack. Maybe the jack is broken or not making good contact with the motherboard. It is necessary to remove the motherboard and take a closer look at the power jack. Resolder or replace the jack if needed.
4. If the power jack is in a good working shape and new power adapter with battery do not fix the problem, most likely you have a faulty motherboard. Replace the motherboard if needed.

Reference: http://www.chargerbuy.com/blog/battery-charges-only-when-laptop-turned-off/


ASUS laptop AC Adapter

Here below is a guide about how to repair laptop DC jack, may it will help.
http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

hi karun, i think your hardware eng may lie to you,its not necessary to change hole motherboard for this problem , if you have problem in your motherboard mean you cannot ON your laptop itself , just try to take your laptop to some-other hardware expert to do this process, or may be he didn't get spare of DC jack for your laptop.

But i am sure if you change your DC jack is more enauf for this problem, i have search how to do DC jack process in online, i got one site too. just check it and try to show it to your Hardware eng.If possible ask about you can able to get DC jack spare in your area , some hardware eng can help you by putting DC jack of old laptop of same model. Just don't change your motherboard until you have try all this process.

just copy and paste the link in your browser : http://www.laptoprepair101.com/laptop/2007/12/06/dc-power-jack-repair-guide/

Good luck ! if you think your problem solved don't forget to rate

i agree with your logic and think its a good idea to get the jack soldered to the the motherboard before anything else is replaced and would hardly cost anything too

Either the battery is bad and not holding a charge, or the laptop's power jack needs to be repaired. Try this check.

Take out the battery and plug in the power adapter. Turn on the laptop and see if it operates normally. Gently wiggle the power plug and see if the power indicator on the computer remains steady. If it does, you should replace the battery. If the power light flickers as you wiggle the plug, the power jack in the computer needs repair.

It's a common problem for the power jack connections on the motherboard to break because the power plug gets flexed. When this happens, power doesn't get in from the charger to run the laptop or charge the battery. These connections can be repaired, but it means taking the computer apart to get the main board out to make the repair. Also, in some cases the board may be damaged by arcing and heating from the bad connections and may not be repairable. Usually resoldering the bad connections fixes the trouble.

A computer service shop could give an estimate for the repair. When I worked at a shop our repair charge was about $75 (I think; it's been over 5 years now). If you have electronic soldering skills and the right tools you could try the repair yourself. Several videos on youtube show the procedure for taking apart the computer to get the board out.

Hope this has helped you. If so, please take a moment to rate my solution. Thanks for asking here!

The problem is that the power inlet jack has a bad connection on the motherboard. The way to resolve this is to remove the motherboard from the laptop and resolder the jack. This is not a repair I would suggest for the novice. If this is not repaired soon, further damage can be done to the motherboard that may not be easily fixable. Please have this repaired soon.
Dan

The only solution that I can think of would be a power jack problem. I would not advise replacing the power jack yourself since you have to take out the laptop mother board, de-solder the power jack then solder the new one on and put it back together. My advice would be to take it to a professional computer repair shop and have them take a look at it and replace the power jack. It is worth getting repaired since power jacks usually range $40-$70.