Question about RCA L42WD22 42 in. LCD Television

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I have the exact problem with my L42WD22 RCA LCD 42"

I was watching a movie then suddenly the speakers went out, all the inputs stopped working, the rf receiver is working fine only with antena but will not take vcr or converter boxes, the only thing that is working is the vga that I use for my computer. there is immage but not sound same for digital channels. where can I buy that Fuse that went out? any help please.

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