Replacing my laptop keyboard with backlit keyboard

Hi,

If your original keyboard is not backlit, you cannot replace it with a backlit one. This is because the backlit keyboards have an extra ribbon cable at the back which plugs into the motherboard and power the backlight. If your original keyboard is not backlit, then your motherboard does not have that extra slot for the second ribbon cable. You will be able to install the backlit keyboard on your laptop but the backlight will not work so it would be better to replace your keyboard with a non-backlit keyboard. 

Hope this helps

I have dell Inspiron 15 3505 can I replace my keyboard to backlit keyboard

The keyboard isn't separately replaceable -- you'd need to replace the entire palmrest-chassis assembly, to which the keyboard is permanently attached.  Beyond the cost, it requires totally tearing the system apart (service manual link below).  Given the potential for damaging something not covered by warranty, you will wind up with a voided system warranty.  Translation:  it's likely technically possible but practically it's not feasible.

https://www.dell.com/support/home/en-us/product-support/product/inspiron-15-3505-laptop/docs

@ejn63​ I will never ever ever purchase a Dell laptop again for this reason.  and over the last 25 years, I have had many. I feel like I have thrown $800 in the garbage. Cannot work in low light because you can't see the keys? And the backlit cable costs about $1. Good move Dell, you lost a lifetime sale of an entire family to have saved $1 on the build! Give the head Engineer a raise!!

@ron564848​ Hi, I have a Dell Inspiron 3530 i7 8th Generation. As I saw the keyboard is non-backlit, I went back to the seller shop as he told me this PC have Backlit Keyboard, then he Changed the keyboard with the same model laptop but the problem was with that keyboard, he said to wait until next week the new keyboards are about to receive then he will change it. But yesterday, it worked with the backlit keyboard; just some of the keys didn't work, and that was no problem with my Laptop. 

I'm using a dell 7250 i7 and the keyboard isn't back lit. Is it possible to buy a back lit one and replace it on this model or should I consider getting a new pc? 

i have this non backlight keyboard too but my laptop is dell latitude 3420
Does dell have a backlight model of this or can i just change the keyboard to a backlight one