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Registered Member #96
Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Just fixed a Dell 17" monitor which emitted a loud bang and smoke on switch-on (had intermittent fault before)
Turns out that it had blown both 3.15A Littelfuses spectacularly, metal plating the surrounding PCB, and a capacitor had blown on the CCFL drive board.
Reason for failure was... Brown conductive glue between the main drive transistor's heatsink and the posistor, basically shorting mains to ground (!) Chipped off glue and cleaned up PCB, changed fuses and capacitor, and she works!
Lucky it wasn't a Dell laptop, or I'd need the fire extinguisher :)
Lyrics to "Who let the Smoke Out."
Who let the smoke out (whoo, whoo, whoo, whoo) (whoo, whoo, whoo, whoo) (whoo, whoo, whoo, whoo) (whoo, whoo, whoo, whoo)
Who let the smoke out (whoo, whoo, whoo, whoo) Who let the smoke out (whoo, whoo, whoo, whoo)
(whoo, whoo, whoo, whoo)
When the circuit was made, the product was sumpin' (Hey, Yippie, Yi, Yo) And everybody proud of it all (Hah, ho, Yippie Yi Yo) I tell the fellas "start the thing pumpin" (Yippie Yi Yo) And the plug goes in to the wall
The smoke broke show brown
Who let the smoke out (whoo, whoo, whoo, whoo) Who let the smoke out (whoo, whoo, whoo, whoo) Who let the smoke out (whoo, whoo, whoo, whoo) Who let the smoke out (whoo, whoo, whoo, whoo)
I see a little smoke puff–makin' some toast Lights really dim in the town Get blame off me, shame off me Rollout is gon' take a bit longer
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(OT) Smoke Test?
