2003 - 2nd build- installed mb, then noticed a few burrs on no-name cheap case and decide to file them down. Created quite a bit of metal dust all over motherboard. Not quite comprehending the nature of the problem, decide to used "canned air" to blow out all the little particles.
Looked like it worked to me...but the canned air was not certified for electronics and I did not take into consideration the propellent residue. I am not sure that there was a single uncontaminated circuit remaining. Got worse - compounded problem by not verifying complete latchdown of cpu hsf. Turned it on. Did you folks know that sufficient short induced rpms for a quality cpu fan not latched properly can result in lift-off? This is especially true if you get a nice boost from small capacitor explosions. Good thing the fan cable acted as a tether. Only took a couple of days to air the room out, replace the wall circuit, some minor repainting. Made the folks at New Egg and Zipzoomfly real happy though, with another $3K set of orders....almost (not quite) enough to think about Dell.