I heard some strange noise from my less than a year old PC when it came back from 'sleep' mode; For about 10-20 seconds I could see bright light visible through ventilation holes (somewhere near the back panel); gradually the fire/flash died down, I could still smell some smoke out of it for the next 10 minutes afterwards. Upon opening up the case, I cannot quite tell where the burning exactly was coming from.
I had since turned it off and on several times, and had not noticed any obvious problems with it. Still all drives are showing, same amount of RAM, etc.
What component could have been burning like this? Will it do it again?
UPDATE: Thanks to all for the comments/answers: I have emailed the retailer (NCIX Canada) I got this PC from, with the description of the problem to see if their tech can take a look at it, as it sounds like I can't ignore it.
UPDATE 2: I had not tried everything indeed. Turns out the DVD drive connector cable was burned out; will see what happens now that both DVD drive and PSU got replaced ...