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Lines across screen 14 XPS L421X


I can't determine if I need a new screen or what to do to resolve this issue. I've tried taking it apart and reseating the video connection, but there's no change. I'm debating on buying a complete replacement screen assembly, but I'm not sure it will fix the issue. Please let me know if anyone has experienced this issue.

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RE: Lines across screen 14 XPS L421X


Thank you for writing to Dell Community Forum.

Please run the LCD BIST, following the steps from the below link:


The faulty part could be either LCD panel or the LVDS cables.

Please private message us the service tag of the system along with your email id (Note: please don't mention the service tag or email id on the public forum as it contains your personal information).

DELL-Akshatha M
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