Dell XPS M1330 PC Notebook can't connect to the external monitor

The XPS1530 uses Vista so go to the control panel and choose the port that you have the external monitor connected to. I use an HDMI cable and need to choose both the audio and video separately in the control panel.

The XPS M1330 has no video card, the video circuit is integrated into the motherboard. To determine if the video circuit or LCD display is the culprit, try connecting an external monitor to the 15 pin VGA plug on the side of the laptop. If the display on the external monitor appears normal then your LCD on the laptop is the problem, if not then you need a new motherboard.

faulty screen / inverter or grahics card on motherboard

use external monitor to check signal from laptop to monitor,

if signal is ok. then screen needs replacing

if no signal then graphics card problem

You need to check the device manager for any "!" symbols. They are most likely there for your audio and video drivers. This means that the current drivers installed are not compatible. See below for the correct drivers.

Vista 32bit
Vista 64bit

connect an external PC monitor to the slot on laptop...
you will know where is the issue....
if the monitor works then there is an issue on the display of laptop....else some other issue....

try external monitor...if u see a image run diagnostic..

go to control panel- sound and audio devices- click the voice tab- click on the "test hardware button"
follow the prompts. if it tests ok there and still doesnt work in something like skype, then you'll need to go through the settings OR setup wizard in skype in this example and choose the internal mic instead of the external which isn't there.

Replace the LCD
http://cgi.ebay.com/FOR-DELL-GR549-M1330-N133I5-L01-LCD-SCREEN-13-3-WXGA-A_W0QQitemZ180448046930QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item2a038aaf52#ht_3611wt_1202
http://support.dell.com/support/edocs/systems/xpsM1330/en/sm/display.htm#wp1109848

Yes, it is possible you can connect 2 or 2 billion external monitors, all you need is the extension cable, which is normally called a spilter or usb to vga spilter, and you can connect as amany as you want.
remember, USB to VGA adapter. or spilter.
else

There's plenty of evidence to indicate that using two screens is more effective than one; at least up to a certain point. There's also a strong indication that those two monitors need to be the same size, since your visual receptors seem to get confused by screens of different sizes. A recent Utah study indicates that using 2 20-inch monitors allowed people to complete tasks 44% faster than using 1 18-inch monitor, making a pair of 20-inch screens from Dell for under $600 sound like a steal. Since many people I know have switched to using a laptop as their primary machine no matter where they are, the trick of using two monitors (at least when docked) can be crucial.
The trick I use for connecting 2 external monitors to my own laptop is to connect one to the external video port on my laptop and a second monitor gets connected to a DisplayLink adapter. The adapter connects via USB allowing you to extend your desktop to another screen. They are sold under a variety of brand names which makes the adapters a little tricky to track down, but a quick search of eBay for USB to DVI Adapter turns up several options that are basically the same thing under several different names. DisplayLink also links to several online stores, although they do a lousy job of labeling which country each store serves.

The M1330 is not in stock anymore at Best Buy, here is a choice of Dell laptop different models that can be purchased online.