Problem with Internal disk on MacBook Pro 1425 (RD, 2012-2013)

Hi!

A couple of weeks ago I decided to change the internal disc of my MacBook pro when I open it to clean the connection of the trackpad which was having some issues. I saw that the replacement was easy, and decided to go for it.

So I bought an 500GB M2 SATA disc, an WD, this one: https://www.amazon.es/dp/B073SBX6TY/ref=cm_sw_r_cp_apa_glt_i_276NW7V8V7QP0VWSN70V?_encoding=UTF8&psc=1

I also bought an adaptator for it and go for the change. And then began my problem. When I swapped the disk, I started the MacBook pushing the keys for recovery options and it start without problems to the menu, but when I go to "Disk Utilities" i didn't find any disk, only the Mac rescue image.

I remember that some tutorials recommend to disconnect the battery so I opened the macbook again, disconnected the battery and tried again. Same result. I become a little bit frustrated and swapped back the original drive in the macbook. The result: Question Folder. Started again the recovery menu and went to Disk Utilities and the original drive was not there.

The MacBook seems to not be able to recognize any disk at all so I started to think that te problem was with the flex cable to the motherboard. I ordered a new one on AliExpress.

Yesterday I received the flex cable and started the process all over again. I can't manage to install any internal disk, so I have now a useless MacBook.

In case this info can help anything, when I put an external HDD or SD, the disk utility do find those. Maybe an extreme solution could be to install macOs on any external device or SD, and set it always there, but first I wish to try all the options and check if I I'm missing something.

I decided to swap disk because some years ago I changed the nvme disk for my brothers MacBook Pro Retina from 2013-2014. The method was different from mine, but wasn't very difficult.

Any help?

Thanks a lot in advance!