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This indicates either that the power indicator is burned out (which does happen...) or that there is no AC power reaching the indicator, which is usually wired directly across the power transformer or wired to one of the filament windings of the power transformer. No AC reaching the indicator is more likely than a burned out indicator AND no sound, so the fault may be one of these:
It is also possible that the wall socket is not live. Plug some other AC powered unit into the socket and see if that unit works. If it doesn't, the AC power breaker may be open.