Earler today I fitted a new mobo to my computer. When I switched my computer on there was a loud unhealthy noise for about 5-10 seconds and then the computer cut out leaving a burning smell. I looked inside the case and discovered that I forgot to connect the CPU fan to the mobo.
When I try to start the computer now nothing happens, it seems to be dead, except I get a faint hissing noise for a few seconds when I disconnect the power.
Have I totally destroyed my PC?
Also, I did not apply any thermal compound to the cpu before all this happened, I don't know if that has any significance.
I managed to destroy a CPU by using a heatsink a colleague assured me was good enough for my shiny new CPU... A few minutes of 'Yes it worked' followed by a pffftttt... and one dead CPU. Needless to say I don't follow his advice any more!
I changed the CPU and everything was fine.
You should definitely use thermal paste - Arctic Silver or Arctic Ceramique are best. I'm sure you've learned a hard lesson that you need to double check every connection. Every system builder will make a mistake like this - and usually only once!
When putting together a system I usually leave the cover off when first starting it up... Even if all connections have been double checked I prefer to see that every fans etc is working normally before closing the case....