So a few months ago I built my first PC and really got interested into computers. I had an old computer lying around that I used my whole childhood so I wanted to clean it out, and turn it on to see if it still works good enough just to browse the internet or something. I took all the components out and cleaned then since they were really dusty. I cleaned the thermal paste too and put some new on. I put everything back in the PC as it was and I tried to turn it on but when I did nothing was working and I noticed a burned smell but didn't know where it was coming from. Could it be that my power supply died?