DC jack output to mainboard on vaio laptop

[ColMustache]

Today when I woke up the charger pin was so hot that it had melted the rubber end, so I finally got a spare DC jack and cable to replace it, since its not soldered to the motherboard.

http://imgur.com/PD0P4Ka

The only one I could get is a simple DC to motherboard, meaning 2 red and 2 black cables, like the one in the picture above and this laptop uses one similar to the other but instead of 2 extra black cables uses 3.

Are those extra black cables regular grounds (negatives)?

They're screwed to the motherboard on different places. Can I somehow just splice those 3 to the 2 that the spare cable has?

 

[jarotech]

Hi, they should be ground also, if you can measure the continuity with a multimeter, you will know right away if they are connected together. What is the model you have?

 

[ColMustache]

Hi, they should be ground also, if you can measure the continuity with a multimeter, you will know right away if they are connected together. What is the model you have?

Hey, the model is VAIO SVE14117FLB and the replacement part seems to be PJ 093, but it will take weeks to arrive and cant afford to stop working (student) in the mean time, so I guess I'll split open the original cable just to be sure if all three are grounds.

 

[jarotech]

I think you can remove the black cable with the round connectors and use it with the new jack.

 

[ColMustache]

I think you can remove the black cable with the round connectors and use it with the new jack.

Like cut a small portion of the cover and splice the black cables together? Im kinda scared to fiddle with it but basically sounds simple..

 

[jarotech]

Do you have a connector on both cable with two red and two black, and the original have an extra black wire with the round connectors?

 

[ColMustache]

Do you have a connector on both cable with two red and two black, and the original have an extra black wire with the round connectors?

Yes that was the case.
Thanks for your answers, all 3 cables with round connectors were indeed grounds and the operation as a success!

http://i.imgur.com/8XTECmc.jpg