I have a Vizio E321MV LED edge lit LCD tv. When I power up the tv
after it's been off for a while I sometimes notice that it can makes
a few random clicking sounds (e.g. could be a few clicks in a row
hapening within a 1 second time frame, but not until several seconds
(or more) of time has elspsed since the power on was pressed). These
clicks are NOT coming from the speakers. To me, it sounds like the
plastic case expanding/contracting, but I would not expect this happen
so quickly after being turned on, especially with an LED backlit TV.
I've also sometimes noticed the clicking happening after powering off
as well. Again, it is NOT coming from the speakers.

Any idea why this clicking can happen when powering on/off ,and is
this normal? Keep in mind this is LED backlit and not LCD.

Thanks,

J.