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A horizontal line is visible in the middle of the monitor which cuts the data. I have purched the laptop yesterday. When I make the laptop stand by and use again the line is not visible. Please let me know whether this is a manufacturing defect or can be solved.

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Hi, sorry,what is "purched" mean? usually trouble comes LCD cable/cable plugs/sockets also at motherboard side, it could be dirty or temp disconnect, it is not easy to check and repair if you are not Engineer, due to easy to damage other component.
Only less defect by manufactory that is LCD panel board inside which you have to send warranty repair or change LCD panel.
you may try if you have experience of computer engineering:
1)open LCD panel cover check the cable to LCD rear socket, take out the plug and clean them using small brush then put it back.test it if trouble again do follow step:
2)open laptop up cover beside keyboard to find out where the LCD cable plug is and plug the cable out and in, test it if trouble again, do next
3) check all LCD cable from line to line between two plugs.
Important do all steps carefully.

Posted on Dec 21, 2008

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Suddenly a very thin vertical yellow/white line appearing on my HP desktop monitor? pls help


Does it appear THE MOMENT you turn the unit on?

If it does, then you will have to run the monitor's self-test function by turning it on with the data cable (the one that does NOT connect to the power outlet) DISCONNECTED from the computer.

If the line still appears, then the monitor is faulty & cannot be "repaired". Usually, the entire LCD module is replaced.

If the line does not appear in the self-test mode, then check if it's connected to an ON-BOARD display adapter (typically found in the back of the machine, towards the middle area, towards where the ethernet cable and USB devices plug in) or a EXPANSION CARD (normally located towards the BOTTOM part in the back of the machine).

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If it plugs in to the on-board slot, then the motherboard may be faulty. If it plugs in to an expansion card, then it's the card that may need to be replaced.

Of course, these are merely possibilities, but the most likely failing component here is the monitor itself. Busted display adapters very rarely, if at all, manifest these horizontal or vertical lines and STILL boot up. Regardless if it's on-board or expansion card, a failing display adapter would normally have either no display at all, or it would just simply stop booting up (screen remains dark: no lines).

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1 Answer

Horizontal line appearing on desktop


The fault looks like white lines horizontally along the screen. These are the retrace lines that become visible due to absence of proper screen/grid voltage. You will need to open the monitor only if you are familiar with power electronics, a bit of experince is important as the stages are delicate and contains high voltage. If not take help, check for faulty capacitor or low value of resistors in the screen/grid sections of the crt. Couple across parallel to the suspected capacitor to confirm and change. Use a meter to see the voltage across faulty resistors. In some cases reducing the screen potentiometer ( onthe Line output transformer)can solve the faulty. Hope you try. Good day

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1 Answer

Monitor suddenly goes black with alternating horizonal lines, some thin some wide. Shut off for a while and now the picture is very washed out.


there are 2 parts involved in horizontal lines. videocard and LCD. if this is a desktop just diconnect the data cable from computer and check if the LCD self test will appear also check if you still see the lines, if lines are not visible in the self test definitely its your videocard taht you need to replace.

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Sounds like your monitor or graphics card may be going bad.

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Happy turkey day, I have a westinghouse lcm-19w4,when I turn it on the screen flashes gray horizontal lines in the middle of the screen for a second then goes black. this happens a couple times then the...


You either have a hardware problem with your video card. ( may have pop out of socket when you plug in the monitor) or the cable is not allow communication to the monitor. As long as the amber light comes on you know you have power so focud on data cables and hardware.

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Try checking the monitor and monitor cord to make sure they are working properly. Try it on another computer and see if the lines are still there. If they are, then you will need a new monitor and if they are not, then you may need a new monitor port for your computer. You will need that checked by a professional to be sure. If you can, open the computer and check the connections from the monitor port to the motherboard and make sure they are ok.


To contact me, just re-post and I will try to answer any questions or comments immediatley.

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This could be one of two things:
It could be the monitor that is going bad. If it is, it would be best to replace it.

Second, It could be the Video board or the system memory. Which can be repaired.

If you have access to another monitor or a friend's system,try your computer on it. This will tell you whether it is the monitor or the computer.
Post the findings here, and we can continue to T/S it.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe

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1 Answer

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change the ram and viedo card agian

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