On Mon, 14 Jun 2010 10:15:57 -0700 (PDT), powerampfreak
wrote:

The powersupply input has no MOV.

It's usually on the fuse holder or input filter. The idea is that the
MOV should be the first device the power sees after the fuse, but
before any circuitry. For power supplies with AC connectors mounted
on the PCB, the MOV will of course be mounted on the PCB.

I thought this from the begining
until I realized it was a inrush limiter NTC.
Actually, if looking very close to the NTC body, there are a small
small mark in the middle, but not a hole.
If this was the source of flame I would suspect more evidence.

It's probably not the NTC thermistor. It looks very much like an MOV,
but goes between the input bridge and the input DC filter caps.
http://www.gesensing.com/downloads/datasheets/920_325a.pdf
If it were smoked, the resistance would be quite high and the scope
would not work. However, you might consider scraping the hole with
something sharp to see if it can be enlarged. If the outer coating on
the TNC themistor collapses into an internal cavity, then there's a
problem.

Got an IR thermometer? Wave it around the power supply and input
section to see if anything is hot and ready to blow.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558