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Default Hitachi 51S700 proj. tv - fan quit shutting off

I just noticed yesterday that the internal cooling fan (some teeny
little whining fan in there, to cool a cpu chip or the circuit boards
in general I assume) has stopped turning off when the set is turned
off. The fan just stays on as long as the set is plugged in.
Unplugging and replugging it in - fan just comes on again. Before
this the fan always quit when the set was switched off.
Is there any harm in just ignoring this? Other than that it's still
works flawlessly with perfect picture, no burn-in, I adore this set.
It is a #51S700 Ultravision set, I bought it new in 2003. Thanks!
 
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