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There is no fuse for sound.
Check that all replacement capacitors are securely soldered in place and there are no cold solder joints or broken tracks around the soldered area.
Other components nearby may have gotten damaged through thermal shock when the capacitors were being replaced if a lot of heat was applied to the board - check for any visual signs of burning to other components.
If sound was working ok previously then something has changed...
check the board connections, wiring, etc - perhaps something is loose?
I don't have any schematics to hand for this particular model, however the voltage test points are usually marked on the circuit boards.
I will check.