New lcd no backlight

[excilem]

So i bought a new lcd screen for my dell inspiron 15 7559 (my older one had dead pixleeel in one corner) and plugged it in first when i started the pc the screen worked fine but then i had to unplug it again to get the top cover from the laptop and when i tested it again it had no backlight. I tried the oldee one and at first the older one worked fine but when i tried to fix the new one the older one had no backlight too. So i dont think that the cable is brokem because the older one workes fine in the beginning. So i dont know if the backlight ia turned off from Windows because i c n plug in an external screen and this one works.

Thank you for helping.

 

[jarotech]

Hi, did you unplug the battery while you changed the screen?

 

[excilem]

No but it was turned off

 

[jarotech]

Even though the laptop was off, the battery gave the voltage needed to power the motherboard. So, I think you blew a fuse on the motherboard when you connected the cable to the screen.

 

[excilem]

Can i replace it or how much would it cost to replace it?

 

[jarotech]

If the problem is a fuse, it will not be expensive to replace it, but the cost of replacing the component varies from where you go to get it fixed. Get a cost estimate before getting it fixed.

 

[excilem]

Ok i will go a shop today thank you very much for spending your time to help me. I didnt expect an answer so fast.