Some laptops, such as Toshiba A665 seriesToshiba L505 series and HP DV6-1200 series were made with either 15.6″ or 16.0″ screens. Some models were made as 15.6″ or 16.0″ right away, but some were issued as 15.6″ with an optional upgrade to a 16.0″ screen. During the laptop assembly, the video cable does not need to be upgraded, as long as both screens have the same backlight type, but the case parts (the front bezel, and, in some cases, the lid) will be different.

When you see more than one option for the screen size, if you know that your laptop was purchased with an optional upgrade, or if you have a CTO (Custom-To-Order) laptop model, please make sure to order by the laptop screen model, if at all possible.

Upon removing the screen from the laptop, you will have an access to the screen model number. The model of the laptop screen (the one that’s listed at the back of the LCD) will have the size included in the model number. For example, an LG panel with the modelLTN156AT01  indicates that this is a 15.6″ screen (hence, the model number LTN156).

For more information on locating and using the LCD model number, please read this article.


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    Hello there,
    I got HP laptop with broken screen.

    Now i want to replace that one, but i got two different model number on back of screen:
    1) on white sticker LP156WH4(TL)(Q1)

    2) on screen pcb :LP156WH4(TL)(N1)

    Please suggest me which one is correct.?

    waiting for your reply.



      Hi Prakash,

      Thank you for an excellent question!

      In your case the “later” model number will be the authoritative one: LP156WH4(TL)(Q1)

      Although your screen has the markings of LP156WH4(TL)(N1) on the PCB (in this case the LCD driver board),
      the whole screen can be different from LP156WH4(TL)(N1) in the following ways:
      – It may have different surface finishes (Glossy, Matte-Film, Anti-Glare Coating)
      – It could have been manufactured later in time
      – It could include a more updated firmware version
      – It maybe “customized” for a specific laptop model/brand
      (“Customized” in way to be only able to run on certain laptop models, or in-reverse could be the only panel authorized (via software lock) to run on the specific laptop models)

      It is also likely, barring any software locks, that either models would work fine on your laptop.

      When it comes to the LCD screen model numbers the convention is that the last two characters (Q1)/(N1) will play the least likely role in the compatibility of the displays, and usually the most significant difference between the two would be the surface finish: Matte or Glossy.

      Matte screens are Glossy parts with a Matte coating – when the factory is the one to apply the coating – a new model number will be assigned – while all the PCB components remain the same.

      1. Prakash

        Thanks a lot to you.
        will come with new queries.

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