Difference in 25 pin dvi and 19 pin dvi

VGA cables are the standard way of connecting analog monitors to computers. However, a new standard way had to be developed. Some early standards were proposed but eventually, DVI emerged as the new interface for Digital flat panel LCD monitors and graphics cards. One of the most confusing things about DVI is that there are three different styles of cables and connectors. They are DVI-D: This is the most common style. Almost all DVI-capable devices on the market use a DVI-D interface. DVI-A: In a digital-only world, "DVI Analog" would make no sense. However, as with all new technologies, there needs to be a way to connect to older equipment. DVI-A uses a DVI style connector on a cable that sends an analog-only signal, which can be understood by analog VGA monitors. DVI-I: In practice, DVI Analog-only cables are rare, and DVI Analog devices are non-existent.

The DVI Integrated cables and connectors offer the best of both worlds: a single cable and connector that can transmit both a digital and an analog signal. Since a DVI-I connector offers the most flexibility, video cards such as the ATI Radeon 8500 use this connector so that either a DVI digital screen or VGA monitor can be connected. In DVI an Analog signal will only talk to analog devices, and a Digital signal will only talk to digital devices. Trying to convert a DFP or DVI-D (Digital) signal to a VGA (Analog) signal will never work. Single Link and Dual Link: After all these the difference between DVIs, DVI-D and DVI-I also come in either Single Link or Dual Link. The basic difference is that dual-link can support higher resolutions. Single link cables can be identified as having 8 pins missing, while dual-link cables use 24 pins. Single Link: Can support resolutions up to 1920 x 1080 at 60 Hz. Each link has three data channels for RGB information with a maximum bandwidth of 165 MHz, which is equal to 165 million pixels a second. Uses 12 of 24 pins. This is more than adequate for most plasma TVs. Dual Link: Can support resolutions up to 2048 x 1536 at 60 Hz. Each link has three data channels for RGB information with a maximum bandwidth of 165 MHz, which is equal to 165 million pixels a second. Uses all 24 pins. Most DVI digital devices have connectors that can accept dual link cables but there are a few plasma TVs that can only accept a single link cable. So, it's always good to check with your device retailer about the appropriate cable to choose from. Here you will get more information and differences about DVI cables type https://www.404techsupport.com/2014/08/21/dvi-types/ .

The 9-pin port on your PC tower is NOT a video port, it is a serial data port. All VGA connectors are 15-pin. Hooking up to the 9-pin port will not get you a picture. There should be a VGA port on the PC, or else a DVI an/or HDMI port. You can get DVI-to-VGA adapters that work, but only if the DVI port is an analog DVI, not if it is a digital DVI (DVI-D or DVI-DD).

HDMI is digital
VGA (the 15 pin connector) is analog.
If your connector has the digital to analog interface it should work, but likely it does not have that chip and thus will not work.

Your description of the problem tells me it may never work as you have it connected. Possibly it might be that the monitor is required to be powered on before the laptop is booted, but that only works in some cases.

I have also seen some work if a 2-step connector is used.
VGA to DVI connector, followed by DVI to HDMI connector.
DVI was the step toward digital that came before the HDMI standard was implemented and was only partially digital. DVI and VGA do not carry control signals nor audio. HDMI carries both those as well as the video.

YMMV but I think it would be cheaper and more efficient to actually purchase a monitor with a digital input (HDMI or DVI).
Without the digital/analog converter interface a digital output device (your laptop with HDMI out) can never operate an analog device (your Dell monitor with VGA input).

This monitor has two types of video inputs, a 15 pin VGA D-sub connector and a DVI connector.
If the video card has a 15 pin D-Sub then connect the video cable to the 15 pin D-Sub connector on the monitor.
If the video connectors are DVI then connect the video card and monitor with a DVI video cable.
You will also need to configure the monitor for either the D-Sub or DVI video input.

DVI stands for (D)igital (V)ideo (I)nterface.

DVI is a new form of video interface technology made to maximize the quality of flat panel LCD monitors and high-end video graphics cards. It is a replacement for the P&D Plug & Display standard.

you can connect high definition monitor , LCD projector , LCD T.V to a DVI port

There three kind of DVI connector
1. DVI-D (Digital)
2. DVI-A (Analog)
3. DVI-I (Integrated Digital/Analog)

DVI-D format is used for direct digital connections between source video (namely, video cards) and digital LCD (or rare CRD) monitors

DVI-A - High-Res Analog
DVI-A format is used to carry a DVI signal to an analog display, such as a CRD monitor or and HDTV

DVI-I - The Best of Both Worlds
DVI-I format is an integrated cable which is capable of transmitting either a digital-to-digital signal or an analog-to-analog signal, but it will not work transmitting a digital-to-analog or analog-to-digital signal.


How to Recognize These three types of DVI Cable
There are two variables in every DVI connector cable, and each represents one characteristic.

The flat pin on one side denotes whether the cable is digital or analog:
A flat pin with four surrounding pins is either DVI-I or DVI-A
A flat pin alone denotes DVI-D

The pinsets vary depending on whether or not the cable is single- or dual-link:
A solid 27-pin set (rows of 8) for a dual- link cable
Two separated 9-pin sets (rows of 6) for a single-link cable

The DVI [Digital Visual Interface] is a standard for high-speed, high-resolution digital displays.
Below is a 24 Pin DVI Female connector seen at the Computer. The connector diagram and pin-out table show a DVI-I Digital and Analog [RGB]; 29 pins [modified D style] connector. A DVI-D Digital only connector with 24 pins [modified D style] looks about the same with out the 4 analog 'C' pins.

The DVI interface is found on a number of devices including TVs, Computers, Monitors, and Video cards.
Digital Visual Interface [DVI] was developed by the Digital Display Working Group (DDWG).
Note that the Digital Display Working Group disbanded around 2006, so don't expect an up-grade for DVI.

Digital Video Broadcasting/Digital Audio-Visual Council (DVB/DAVIC),
developed by DAVIC [inactive] and DVB [dvb.org].
Adopted by European Telecommunication Standards Institute (ETSI) and
International Telecommunication Union (ITU)
DVI has a number of different types connectors:
DVI-D Digital only connector; 24 pins [modified D style];
DVI-A Analog only; [modified D style], I don't think this is part of the standard
DVI-I Digital and Analog [RGB]; 29 pins [modified D style]
DFP Digital Flat Panel, Digital only connector. Pinout is listed on the DFP page

Styles of DVI Connectors

Hello, the integrated video card in the Compaq s3310cl doesn't have a DVI port, however you may purchase and DVI to VGA adapter which should allow you to hook up that Samsung 2243swx Monitor. Be aware there are various types of DVI connectors so match up the connector you require for you Samsung Monitor.

Thanks

Ryan
Cobalt Systems
DVI Connector Guide DVI-D Single Link DVI-A DVI-I Single Link Digital Only Analog Only Digital & Analog Two sets of nine pins, and a solitary flat blade One set of eight pins and one set of four pins, with four contacts around the blade Two sets of nine pins and four contacts around the blade DVI-D Dual Link DVI-I Dual Link Digital Only Digital & Analog Three rows of eight pins and a solitary flat blade Three rows of eight pins and four contacts around the blade

Most of the Widescreen monitors come with DVI as well as VGA connector. A VGA connector and DVI connectors are different in many aspects. First of all the DVI connector would be white in color and VGA would be blue.
VGA connector has 15 pins and DVI has 24 +1 pin

DVI is digital VIDEO interface, you will need a seperate cable for audio

There is nothing broken, but you must become aware of the different standards in DVI connectors.

1)DVI-D which you have, does not have the 4 analog control pins around the alpha bar meaning it only works on digital devices.

2)DVI-A only has the 4 control pins and no bar, as well as a total of only 9-10 pins altogether. This is designed for analog only, and rarely see it anymore.

3)DVI-I stands for Interlaced, meaning it can work both ways, but will not fit in monitors that are set up for DVI-D because the analog pin sockets do not exist.

You can get more detailed by counting the pins in the rectangular area, if you use all 24 pins you have what is called a Dual-Link cable, so it can support resolutions over 1920x1280 if you have about 9 pins missing it is single-link and is limited resolution.