Hp 440 g1 probook screens with horizontal lines

hello im using hp probook g1 from more than 1 year and now im having prob with the screen. some horizontal lines appear on the screen and below portion of the line flashes and show the upper part of the screen and below part of the lines fleshes with a period of 2 seconds. plz need guidance how can i solve this issue.

Dear Customer,
Welcome and Thank you for posting your query on HP Support Forum
It looks like you are having issues with the Display of your Notebook. We will surely assist you with this issue
1. Please check if the Display/Screen of your Notebook shows lines even in BIOS or not
Note: Power ON the Notebook and keep tapping the F10 Key to access the BIOS
2. Please tilt the Screen/Display of the Notebook slowly towards back and the front side, check and verify if the lines are seen at all the angles of the display
3. Please connect an external desktop monitor to your Notebook and check if the lines are shown even on the external monitor
Hope this helps, for any further queries reply to the post and feel free to join us again
**Click the White Thumbs Up Button on left to say Thanks**
Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
Thank You,
K N R K
I work on behalf of HP

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    hello im using hp probook g1 from morw than 1 year and now im having prob with the screen. some vertical.lines appear on the screen and below portion of the line flashes and show the upper part pf thw screen and below part od the lines fleshes with a period of 2 seconds. plz need guidance how can i solve this issue.

    Dear Customer,
    Welcome and Thank you for posting your query on HP Support Forum
    It looks like you are having issues with the Display of your Notebook. We will surely assist you with this issue
    1. Please check if the Display/Screen of your Notebook shows lines even in BIOS or not
    Note: Power ON the Notebook and keep tapping the F10 Key to access the BIOS
    2. Please tilt the Screen/Display of the Notebook slowly towards back and the front side, check and verify if the lines are seen at all the angles of the display
    3. Please connect an external desktop monitor to your Notebook and check if the lines are shown even on the external monitor
    Hope this helps, for any further queries reply to the post and feel free to join us again
    **Click the White Thumbs Up Button on left to say Thanks**
    Make it easier for other people to find solutions by marking a Reply 'Accept as Solution' if it solves your problem.
    Thank You,
    K N R K
    I work on behalf of HP

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