Isn't there any component I could replace to make it work?

Hi, I have a Raspberry Pi 2 and was powering it using the GPIO +5V and GND, it was working fine. However, I tried powering it using the USB port instead, there was smoke and it stopped working. :( Then I replaced D5, which was getting hot and now both green(ACT) and red(PWR) just keep on. I also tou...

Hey,
I'd like to install Ubuntu Mate using Noobs too. Could you add it to the options?