How can I repair my i run s reebok treadmill?

Hi,
Today I was on my treadmill for about 40 minutes. The first 37 were fine and I ran up to level 5. Then I tried running at a level 7 and after about 2 minutes the treadmill slowed right down, made a pop noise (i think i saw a little flash too not 100% tho) then lots of smoke came out and there was an awful electrical smell. I need to fix it as soon as possible and I would be grateful if anyone could tell me what needs to be replaced?

Thanks a lot for helping!