Chosen Solution

A friend game me an old none working MBP 2010, when it turns on I get the apple logo and an spinning wheel and later the “panic Kernel” error “You need to restart your computer.” shows up. (already tried rebooting with option key pressed, command+R etc.) So I decided to open it and see what I found, and I discovered a little cable that looks like is missing the connector or something, can anyone help me identify it and let me know if is fixable or replaceable?    

Update (05/07/2020) @danj I did it and got this: I’m goint to try in every usb port, but at this point I thinking the keyboard may be broken??

I’m not an expert on kernel panics, but that shouldn’t be related. It’s the keyboard backlight cable…

So you have at least one hardware issue with the logic board. Your keyboard backlight connector is broken, This is repairable, but you’ll need to find someone who has a junker to swap out the connector.

Your OS issue will need a bootable external drive to reformat and install a fresh copy of macOS. I would recommend sticking with Sierra. Here’s the needed image file & how to setup a bootable USB thumb drive: How to upgrade to macOS Sierra, Jump down to Step 4 for the direct download URLHow to create a bootable macOS Sierra installer drive

Well, Last week I replace the HDD of my 2012 iMac, Si i use it to see how bad the MBP was, I found out the following: It seems It has the shift key stuck, thats why it reboots to safeboot, and have no numbers, some weird video glitches and it is extremely laggy and slow (running macOS Yosemite) but despite I see the memory ram installed, it shows nothing, what do you guys think, btw, with this HDD I was able to go into recovery bat the option thing still is a no go, oh and I’m still unable to make that sierra bootable drive