Macbook mid-2012 Keyboard issue

[xalu]

I recently fixed a macbook pro 15, however, I am having some issues figuring out whats wrong with the keyboard.

I replaced the one it had in there since it was sticky and wasnt working. It was working with some keys, but only on startup.

Now with the new keyboard its doing the same thing. Only works on startup then it wont do anything. On startup if I press the caps lock it quickly goes off. (light on then off)

It seems like something is shorting it out. Anyone have any advice or experience something like this before?

(Side note: the trackpad isnt connected since I am waiting on a replacement).

[dellxps15]

Re: Macbook mid-2012 Keyboard issue

test impedance of each pin for keyboard.

[xalu]

Re: Macbook mid-2012 Keyboard issue

I just got it working. I attached a separate trackpad(from a 13" mbp) and it works. I guess it was just because no trackpad was attached. Is that normal?

Once I attached it seems to be working fine.

[dellxps15]

Re: Macbook mid-2012 Keyboard issue

never experienced that. glad u fixed it.... but let's wait some days to be sure fproblem is 100% fixed

[hexdiy]

Re: Macbook mid-2012 Keyboard issue

I hink the internal USB hub is contained within the trackpad. That may explain a lot.