There may be two main issues with the image on the notebook screen:

1.   Backlight issue.

2.  Image issue.

3.  Extra smaller connector on the LCD

NOTE： Pull out the battery and unplug AC adapter from the laptop prior to a new screen installation! This is needed to reset a video card to recognize your new screen. A video issue may also occur if a battery or a power adapter were connected during an installation.

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 1. Backlight issue.

An image issue may be caused by various problems such as faulty video card, losing cables, bad motherboard, faulty screen, etc. In this case, you can usually see the screen lighted up, but with a distorted image. NOTE! Pull out the battery and unplug AC adapter from the laptop prior to a new screen installation! This is needed to reset a video card to recognize your new screen. A video issue may also occur if a battery or a power adapter were connected during an installation.

Backlight issue may be caused by a bad or losing cable, faulty inverter, dead backlight CCFL bulb or power not supplied from a motherboard to an inverter.

Simple Backlight check:Backlight issue may be caused by a bad or losing cable, faulty inverter, dead backlight CCFL bulb or power not supplied from a motherboard to an inverter.

Simple Backlight check:

This is the most common type of CCFL LCD laptop screen with an inverter attached.
Connector A: Video signal connector receives "the image" from a laptop's video card via a ribbon video cable.
Connector B: Backlight connector connected to the inverter (not all laptop screens come with an inverter attached) or hanging disconnected if the screen comes with no inverter attached.
Connector C: Inverter power input connector.  

d
Plug connector B in the inverter. Connector C must be connected to the ribbon cable going from the video card. Connector A must be disconnected. Power up the laptop. If the backlight is OK, you will see white screen with no picture (see pictures below).

If there is no white screen, there may be one of the following issues:
- inverter is not powered up by the motherboard
- bad ribbon cable
- faulty inverter
- dead screen backlight bulb
Also, the following article may be helpful.

  whitescreen

  2backlight

  3backlightbad

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 2. Image issue.

An image issue may be caused by various problems such as faulty video card, losing cables, bad motherboard, faulty screen, etc. In this case, you can usually see the screen lighted up, but with a distorted image.

Please, see the following pictures with image issues caused by a motherboard (video card), cables, bad connections, bad screen etc.
If one of these pictures looks similar to your laptop issue, please, don't jump to conclusions because usually only a professional check up
may help you find the problem.
4all1.jpg
Bad screen or bad cables or faulty motherboard.
  4all2.jpg
Bad  motherboard.
  5badlcd3.jpg
Bad screen.
6badlcd6.jpg
Bad screen.
  7badscreen.jpg
Bad screen (usually physically damaged).
  8badscreen2.jpg
Bad screen.
  9badscreen4.jpg
Bad screen or bad cables or faulty motherboard.
  10badvideocard.jpg
Faulty video card.
11redbacklight.JPG

Faulty screen.

3. 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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