You cannot access and repair the Dell Latitude D630 AC Adapter power jack while the motherboard is mounted to the metal bracket, it has to be removed first. In a Dell laptop the power jack is soldered to the motherboard. If the laptop loses power intermittently when you wiggle the power plug, most likely the Dell ac adapter power jack is hurt and has to be repaired. In order to repair the Dell Latitude D630 AC Adapter power jack you’ll have to remove the motherboard.
Remove two screws securing the cooling fan. Disconnect fan cable from the motherboard. Remove the fan. Remove one screw securing the power button board. Lift up the board and disconnect it from the motherboard. Loosen three (red) screws and remove one (green) screw securing the heat sink. Remove the heat sink.
Remove four screws securing the hard drive bracket. Lift up the bracket and disconnect it from the motherboard. Remove two screws securing the Dell Latitude D630 AC Adapter speaker assembly. Disconnect the speaker cable from the motherboard. Unplug the CMOS (RTC) battery. Remove two screws securing the PC card slot. Lift up the slot and disconnect it from the motherboard.
Remove one screw securing the modem card. Unplug the modem cable from the motherboard. Remove modem with the cable and phone jack. Remove six hex studs from the laptop ports. Remove one screw securing the motherboard. This screw is located on the left side from the Dell Latitude D630 AC Adapter power jack.
Start separating the motherboard from the metal bracket. The motherboard has been removed. Now you can access the Dell AC Adapterpower jack and repair it. If the power jack is broken, you’ll have to replace it with a new one. If the Dell Latitude D630 AC Adapter power jack is loose, you’ll have to resolder it to the motherboard.

Dell Latitude D630 AC Adapter 19.5V 3.34A Features/Specifications : (http://www.usadapter.com/Laptop-Dell-Adapter/Dell-Latitude-D630-AC-Adapter-19.5V-3.34A.html)
Input: AC100-240V (worldwide use)
Output: DC19.5V 3.34A
Power: 65W

Connecter size:
Internal Diameter: 5.0mm
External Diameter: 7.4mm
With central pin inside

Item Includes: AC Adapter and Power Cord.

Groundbreaking new Replacement Product, works as genuine parts, 100% OEM Compatible!!

Dell Latitude D630 AC Adapter 19.5V 3.34A Warranty
12 months warranty

See more information on:  http://www.usadapter.com

I have an HP Pavilion Entertainment PC, and it has 3 jacks on the front of the laptop, a mic jack, a headphone jack, and an SPDIF jack. Does anyone know what exactly the SPDIF jack does?

I have a HP Pavilion laptop. Case closed for the payment of the power cord. I have checked and the problem is not with the power cord or battery. I'm sure it has the power to Jack. If I had a laptop open, my husband can take Jack. But we can not know how to get the darned open. Does anyone know how?
Thank you!