Specific laptop models can come in many sizes and resolutions ,backlight type. Laptop LCD resolution should not be upgraded or downgraded. You must confirm that this screen matches your laptop in SIZE , in RESOLUTION and in BACKLIGHT TYPE to order the right screen.

Certain laptop models come in different screen sizes, resolution and backlight. For example, Dell M1330 may have LED or CCFL backlight. Compaq R3000 was released with 15" or 15.4" screen size and these are not interchangeable. Macbook Pro 15" comes in different screen resolutions and they are not interchangeable as well.
You have to check if your laptop screen has the same SIZE, RESOLUTION, BACKLIGHT prior to ordering to avoid incompatibility issues.

Tips: We suggest choosing Dell screens by laptop model or making sure the screen comes with the inverter (see the screen description). No inverter is needed for LED screens.

1. How to measure Screen size?

 Screen size is measured in inches diagonally from corner to corner as you can see in the

picture below.

TIPS:1 inch=2.54 cm.

measure size

 There are different laptop screen sizes according to the standard: 

screen_sizes

2. How to find out resolution?

 IMPORTANT! Please, confirm screen resolution before buying! Certain laptop models come in different screen resolutions. You have to make sure that the screen you need has the same resolution as the one you are buying. Screen resolution refers to just how many pixels are crammed onto your screen all at once.

    Put simply, a pixel is a little colored dot of light, many of which go together to make up what you see on your computer monitor. The same laptop model may come in different screen resolutions and listed below are the most commonly used ones:

XGA         1024x768

SXGA       1280x1024

SXGA+     1400x1050

UXGA       1600x1200

QXGA       2048x1536

WXGA      1280x720; 1280x768; 1280x800; 1360x768; 1366x768

WXGA+    1440x900

WSXGA+  1680x1050, 1680x945

WUXGA    1920x1200, 1920x1080

TIPS: "W" - means wide screen with the Aspect Ratio 16:10.

There are several ways to find out your screen resolution.
1. Refer to you laptop manual. It should usually be in the laptop specs section. That's the most reliable way.
2. If the manual is not available, you may check the laptop manufacturer's website and find the laptop specs in the Support & Help section using your laptop serial number or model.
Please, search Google for your laptop manufacturer name to find their website.
3. If your computer is up and running, you can check your resolution on-line. Please, note that this on-line tool tells your screen resolution and it only makes sense if you did not change factory default screen settings in Windows or Mac OS.
On-line Resolution Check.
4. The best way to find out which screen you need is to open the display and check the screen model name on the sticker on the back side of the screen. You can also search Google for the screen model to find size and resolution.

3.How to find which one is in your laptop

Laptop screen may come in different backlight types. Single and Dual backlights use CCFL (fluorescent bulb) to light up the imageand require an inverter to power up. LED backlight doesn't require an inverter and uses light-emitting diodes as a source of light.

1. Single backlight means that there is only one bulb, that lights up the screen and the screen has only one inverter connector. This type of backlight is the most common one. Please, see the picture below:
1-ccfl

 2. Dual backlight means that there are two bulbs in the screen and the screen has two inverter connectors. This type of backlight is not very common. Please, see the picture below:

2-ccfl

3. LED backlight used in some recent laptop models and LED screens doesn't have an inverter cable and normally has only one socket to connect a video cable (see picture below).

LED BACKLIGHT

LED backlight is a relatively new feature, it will usually be mentioned in your laptop specs. Check your laptop tech specs to find out if yours has LED backlight. 

dell led

 The only sure way to find out what type of backlight you have is to remove the screen bezel (plastic frame) and check it visually.
See pictures below and our Installation manuals for help.
  0001

002

  003

 Check if your inverter has one or two backlight connectors. One = single backlight, two = dual backlight. 

Single connector

  Single connector

  Dual backlight inverter type 1

Dual backlight inverter type 1 

Dual backlight inverter type 2

 LED screen doesn't have high voltage cable going from the screen bulb to the inverter and if no such cable can be found, you can assume your screen is LED. Please, see the picture below. 

  LED backlight screen

 LED backlight screen 

4.What is the difference with Matte and Glossy screens.?

 
 Please, take a look at the picture below to compare glossy and matte screens installed in the same laptop:
glossy and matte
Left - glossy, right - matte.

 Glossy and matte screens are absolutely interchangeable and it's just the type of the screen surface.Traditionally, laptop screens have had a matte anti-glare finish to scatter reflected light. This has the side effect of scattering the light from the display, increasing blur and reducing contrast ratio, color intensity, and viewing angle.Glossy screens use an optical coating to reduce the amount of external light reflecting from the surface without affecting light emanating from the screen. Their shiny surfaces still reflect more light than matte displays, but are less reflective than an uncoated glossy display would be; reflections of external light sources are not diffused by glossy displays, so certain lighting conditions tend to favor a traditional, anti-glare screen. In controlled environments, such as darkened rooms, or rooms where all light sources are diffused, a glossy display may be more enjoyable for the viewer.
   Glossy displays create more saturated colors, deeper blacks, brighter whites, and are sharper than traditional matte displays. This makes these types of displays more appropriate for viewing photos, watching movies, or even just general computer usage such as web browsing. Also, in extremely bright conditions where no direct light is facing the screen, such as outdoors, glossy displays can become more readable than matte displays, because they don't disperse the light around the screen (which would render a matte screen washed out).

TIPS:Most display manufacturers label their glossy screens under a variety of brand names: 

glossy screens under a variety of brand names

5.Extra smaller connector on the LCD

  The new LCD you received may have different power board layout or have some extra connector except the connectors you need to connect the LCD to the laptop. The extra connector usually used in the touch screen laptops to connect with digitizer or as a data port to update the LCD internal BIOS, if your laptop doesn't have the digitizer leave it not connected.
However, if you new screen has the extra connector it doesn't mean it will not work with your laptop.
Please see the example of the screen with extra connector below.  
 

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