[Please help me, I'm a sort of beginner 3D printer owner and I ran into a major problem]

I fixed my problem by taking apart my printer, and saw a loose ribbon cable. I put it in and it worked just like I just bought it. The cause to this is because of me carrying it upstairs.

[Please help me, I'm a sort of beginner 3D printer owner and I ran into a major problem]

My Ultimaker 2+ was working awesome for 3-6 months or so...

Today I saw that you could plug your printer into your computer so I tried the printer port to my computer. I powered on the printer and it turned on successfully and then I hear POP and I instantly power it off. I try it again, it goes on and I hear the same sound, I turned it off and tried booting it with a SD card inside.

It just didn't turn on.

Now my Ultimaker 2+ is broken and won't turn on. I've unplugged all ports just incase of a fire or something.

Thanks in advance!

-Vinny