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LCD screen back light not working



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 23, 2019 at 23:30 UTC (7:30pm US/Eastern)How to fix a non-working laptop backlight?Thinkpad T60 display has suddenly gone dimLenovo U310 Wifi not working or very slowBack light not workng, replaced laptop LCD, next step?HP laptop display stopped workingWhy is my laptop screen flickering white and grey?Laptop making low-pitched, humming noises when turned off but not unplugged (Lenovo IdeaPad 100)Dell inspiron LCD image failureReplacement of laptop screen, back light issueLG monitor suddenly won't turn on.. power button is blinking





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Short story: The screen back light of my Lenovo IdeaPad 700-15ISK-88IP7000671 failed (the LCD works). I changed the LCD cable and then the whole LCD,without success.



Long story: My laptop LCD started to flicker, so I bought a new LCD. When I changed it, it worked fine, but accidentally disconnected the LCD cable. Then I tried to connect it again WITHOUT TURNING OFF COMPUTER; the LCD cable sparked at the connector, and the back light stopped working. After that I bought new LCD cable, changed it, but the problem haven't fixed. So I bought a new LCD, changed it, but the back light is still not working.



All in all: the back light is not working on 3 LCDs and 2 LCD cables. What's the problem?










share|improve this question









New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

    – K7AAY
    6 hours ago











  • okay, i already did that

    – asas
    5 hours ago


















0















Short story: The screen back light of my Lenovo IdeaPad 700-15ISK-88IP7000671 failed (the LCD works). I changed the LCD cable and then the whole LCD,without success.



Long story: My laptop LCD started to flicker, so I bought a new LCD. When I changed it, it worked fine, but accidentally disconnected the LCD cable. Then I tried to connect it again WITHOUT TURNING OFF COMPUTER; the LCD cable sparked at the connector, and the back light stopped working. After that I bought new LCD cable, changed it, but the problem haven't fixed. So I bought a new LCD, changed it, but the back light is still not working.



All in all: the back light is not working on 3 LCDs and 2 LCD cables. What's the problem?










share|improve this question









New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





















  • Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

    – K7AAY
    6 hours ago











  • okay, i already did that

    – asas
    5 hours ago














0












0








0








Short story: The screen back light of my Lenovo IdeaPad 700-15ISK-88IP7000671 failed (the LCD works). I changed the LCD cable and then the whole LCD,without success.



Long story: My laptop LCD started to flicker, so I bought a new LCD. When I changed it, it worked fine, but accidentally disconnected the LCD cable. Then I tried to connect it again WITHOUT TURNING OFF COMPUTER; the LCD cable sparked at the connector, and the back light stopped working. After that I bought new LCD cable, changed it, but the problem haven't fixed. So I bought a new LCD, changed it, but the back light is still not working.



All in all: the back light is not working on 3 LCDs and 2 LCD cables. What's the problem?










share|improve this question









New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












Short story: The screen back light of my Lenovo IdeaPad 700-15ISK-88IP7000671 failed (the LCD works). I changed the LCD cable and then the whole LCD,without success.



Long story: My laptop LCD started to flicker, so I bought a new LCD. When I changed it, it worked fine, but accidentally disconnected the LCD cable. Then I tried to connect it again WITHOUT TURNING OFF COMPUTER; the LCD cable sparked at the connector, and the back light stopped working. After that I bought new LCD cable, changed it, but the problem haven't fixed. So I bought a new LCD, changed it, but the back light is still not working.



All in all: the back light is not working on 3 LCDs and 2 LCD cables. What's the problem?







display lenovo-laptop lcd backlight






share|improve this question









New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 5 hours ago







asas













New contributor




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asked 7 hours ago









asasasas

11




11




New contributor




asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor





asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






asas is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.













  • Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

    – K7AAY
    6 hours ago











  • okay, i already did that

    – asas
    5 hours ago



















  • Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

    – K7AAY
    6 hours ago











  • okay, i already did that

    – asas
    5 hours ago

















Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

– K7AAY
6 hours ago





Please look underneath your Y700 and find the serial number plate or sticker. Then, on that, find the model number, for there are five different classes of Y700 Ideapad, and many versions of each of those. Click on edit.and put the model number in when you have it.

– K7AAY
6 hours ago













okay, i already did that

– asas
5 hours ago





okay, i already did that

– asas
5 hours ago










1 Answer
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The power to drive the LCD panel might have gone through components it shouldn't have, due to a short-circuit when you tried to connect your screen while turned on.



I would probably run down some of the pcb traces from the motherboard connector, and you might find burnt components/solder areas or a blown fuse. They aren't necessarily easy to find.



Overall, I don't have much hope for your laptop motherboard. You might need to send it to a repair shop if you don't feel confident replacing the components yourself.






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    1 Answer
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    1 Answer
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    The power to drive the LCD panel might have gone through components it shouldn't have, due to a short-circuit when you tried to connect your screen while turned on.



    I would probably run down some of the pcb traces from the motherboard connector, and you might find burnt components/solder areas or a blown fuse. They aren't necessarily easy to find.



    Overall, I don't have much hope for your laptop motherboard. You might need to send it to a repair shop if you don't feel confident replacing the components yourself.






    share|improve this answer




























      0














      The power to drive the LCD panel might have gone through components it shouldn't have, due to a short-circuit when you tried to connect your screen while turned on.



      I would probably run down some of the pcb traces from the motherboard connector, and you might find burnt components/solder areas or a blown fuse. They aren't necessarily easy to find.



      Overall, I don't have much hope for your laptop motherboard. You might need to send it to a repair shop if you don't feel confident replacing the components yourself.






      share|improve this answer


























        0












        0








        0







        The power to drive the LCD panel might have gone through components it shouldn't have, due to a short-circuit when you tried to connect your screen while turned on.



        I would probably run down some of the pcb traces from the motherboard connector, and you might find burnt components/solder areas or a blown fuse. They aren't necessarily easy to find.



        Overall, I don't have much hope for your laptop motherboard. You might need to send it to a repair shop if you don't feel confident replacing the components yourself.






        share|improve this answer













        The power to drive the LCD panel might have gone through components it shouldn't have, due to a short-circuit when you tried to connect your screen while turned on.



        I would probably run down some of the pcb traces from the motherboard connector, and you might find burnt components/solder areas or a blown fuse. They aren't necessarily easy to find.



        Overall, I don't have much hope for your laptop motherboard. You might need to send it to a repair shop if you don't feel confident replacing the components yourself.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 3 hours ago









        AlexLossAlexLoss

        677




        677






















            asas is a new contributor. Be nice, and check out our Code of Conduct.










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            asas is a new contributor. Be nice, and check out our Code of Conduct.
















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