D510 how can I hook up to my stereo?

not sure on the D510 but a lot of D series Dells have a switch on the side to turn the WiFi off and on.If turned off the adapter will not appear in the system devices.

The laptop has one RT/Left mini port on the side or up front. You may require and adapter to a larger stereo plug if the Mini Adapter is too small for the speaker line input. If you have Two wires to the speakers and no Mini-Plug, you need Converter from Mini Plug to Right and Left Ports. Best you take it with you to RadioShack and they will match up the adapter you need then and teher.

http://www.amazon.com/Dell-Workstation-Performance-Interlaced-Professional/dp/B008D3NKAS/ref=sr_1_1?ie=UTF8&qid=1366389036&sr=8-1&keywords=dell+precision+380

On the left side are different views. I am looking at the REAR view

At the Bottom, of the Rear of the computer, are 6 expansion slot openings.
Two of the expansion slot openings have an adapter card in them.
The other 4 are covered with an expansion slot cover. (Metal)

One of the adapter cards is a Graphics Card.

Looking at the Back of the computer, and from Left to Right;
there is a;

1) S-Video port
Black in color, round in shape

2) DVI port
White in color, parallelogram in shape

3) VGA port
Blue in color, parallelogram in shape

This article shows a graphics card with the same setup,

http://www.hardwaresecrets.com/fullimage.php?image=879

S-Video,

http://en.wikipedia.org/wiki/S-Video

http://www.hardwaresecrets.com/article/Video-Connectors-Tutorial/157/4

You can use the S-Video port, or the VGA port, or the DVI port; to connect a monitor.
However out of all three, the DVI port is the best.

VGA is Analog.
Your computer puts out a digital signal. (Digital video signal)

DVI is Digital Visual Interface. In otherwords - Digital.
Therefore DVI is the best.

http://en.wikipedia.org/wiki/VGA_connector

http://en.wikipedia.org/wiki/Digital_Visual_Interface

Armed with the above information, can you clarify more about your problem?

For example;

Monitor cable has three prongs........

Using the above information, can you tell me what monitor cable it is?

Computer has two...........

Can you tell me where on the computer, you are trying to plug the monitor into?

Please post back in a Comment.
Regards,
joecoolvette

Please check out the following steps to confirm the real issue:
1. Take the battery out of the laptop & try to turn on the laptop using power adapter only. If the computer turns on, then the battery is defective & needs to be replaced.
2. Make sure the power adapter is not defective. Test the output voltage of the power adapter using a voltmeter. Compare the voltmeter reading to the nominal value written on the adapter or the laptop.
3. Make sure the DC jack is not loose or broken. A loose DC jack will need to be re-soldered. A broken one will need to be replaced.
4. If you have another processor which is compatible with your laptop's model, try swapping processors & test to see if the laptop will work.
5. The power button could be bad
6. The motherboard could be defective & needs to be replaced.

I think the most likely cause is that your dell charger is broken, just try a new charger to test:
Replacement Dell Latitude D510 AC Adapter 90Watt 19.5V 4.62A

Hello, the problem you are having is caused by a loose connection on your motherboard between the charging port and the motherboard. You can either open your computer and try to solder it, or you will need to replace the motherboard.

Another possible cause is that your laptop charger is dead. If you can't confirm, just get a new ac adapter, it is much cheaper than replacing the motherboard:

Replacement Dell Latitude D510 AC Adapter 90Watt 19.5V 4.62A

Replacement Dell Latitude D510 AC Adapter 65Watt 19.5V 3.34A

pull the rubber boot back off the wiring harness in the crease of the drivers door and check for broken wires there. common problem due to the number of times these wires flex to allow the door to open and close

The microphone input is a mono input.
To record in stero you need a USB stereo input adapter.
Please click on this link to this WEB site to purchase :-
http://www.usbgear.com/computer_cable_details.cfm?sku=USBG-X4S&cats=121&catid=121

1. If available, try an AC adapter from another D or E series Dell and see if the system powers on. If none is available, use a multimeter to see if the DC output of the adapter is around 19 volts.
2. If the system doesn't power on with a different adapter or if the Voltage is good on the adapter, then the failure is most likely the motherboard.

I normally plug my stero line-in connection in earphone output jack.
for better results I'm using a USB audio adapter to interface 5.1 amplifier.