How to unbrick a Note 2 without loosing data?

Hello!

I just changed the screen of a Galaxy Note 2, and everything worked perfectly.

When I was going to charge it, the phone went into download mode, i figured the charger was faulty, but it worked on another phone.

When I ejected the charger it went black and won't turn back on again. There must be a problem with the charging port, right? I think I've read somewhere that you can put it into download mode by using just two of the pins, in some way. Might this be the case?

Hard reset won't work, there's just no way to jumpstart it.

Any suggestions?