Any chance some some tips/help/direction?

What is meant they acted similarly, from a FUNCTIONAL point of view (circuit protection), fuse disconnects wire, whereas diode "connected" (short circuit).. always thought only fuse can protect circuit, by cutting power, here, a short-circuit did the trick.....

Thanks DEAR friend - before seeing your post, could NOT resist the temptation!!

took soldering iron, removed one side came clean, other side did not heat enough i didn't want to harm other component, so it got "ripped" a little, and device is back fully operational.. incredible!!!
thanks... never realized diode acts as a fuse learn something new everyday!!


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closeup , the heated component is marked "BE" - suspect it is a diode! very tempted to remove entirely, any thoughts welcomed!...

Friends,
It appears I've accidentally applied 19VDC to a PCB that should only run 12VDC.
The board now does not power on, even with 12VDC..
Using a thermal camera shows entire board remains COLD except one component (near power plug) that heats to 120C and higher!!

Suspected component is marked with "T" (slanted) and "BE", think/hope it is some kind of fuse, in photo just ABOVE the green power terminals and LEFT of the 16V capacitor (on right of photo)

Interesting part is measuring continuity across that component shows 0-reistance...