Question about Sony KP-53S35 53" Rear Projection Television

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Loud pop, and no more picture???

I guess im looking for some help here. i was called about a sony kp-53n74 that experienced a popping noise, and then no longer functioned. i know alot about electronics. from crt repair, to actual board engineering. but im looking for any guidance, as i dont work on rear projection tvs. thanks

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I don't know if this will you but I just experienced a similiar problem with a sony kp-53s35.
It turns out that a fluid leaked out of a rubber boot on one of the guns( I have no idea what the fluid is or why it is corrosive), down to a circuit board and started to desolve a jumper wire. when it had eaten away enough of the wire, the residue or solution was conductive enough to cause an arc to a ground bus bar that ran along the circuit board. The TV still worked but would crack and pop like firecrackers inside.
I was able to increase the distance to the ground source by bending the bar away. Then I scraped and scrubbed the board with contact cleaner to remove residue and replaced jumper wire.
Has worked fine since.

Posted on Feb 23, 2008


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