MacBook Pro won't charge and dead

Hi guys,

One day my macbook pro didn’t charge anymore and from the magsafe port came a high pitch sound. I disconnected immediately. I was not using an original charger for a few years now, my bad, that was probably the reason for my troubles now. I disconnected and made a backup of my files, so the computer itself was still working. As I opened it up I saw that the battery was bloated. I let the battery discharge for safety reasons and ordered a new battery from Ifixit and used the guide to change it. I bought a new magsafe 2 charger from apple. When I was done the macbook pro still didn’t charge or turn on. I double checked if everything is connected properly. I had the feeling that I didn’t break anything (but you never know).

I used different outlets, and all that basic stuff.

I reset the SMC (like 15 times after every new troubleshooting idea I found on the internet).

So I thought that it may be the magsafe 2 in-board. I bought a new one and installed it too. Still the same, my mac is just dead.

There are no burns or anything like that, my mac looks pretty nice (now that I cleaned it) from the inside.

Any suggestions?

Edit: I should also mention that the battery didn’t leak and there were no other fluids in the mac. I did a complete tear down and everything looks good for the naked eye.