Hello my name is Eric,
Welcome to Just Answer
I can help you with this issue,
Just make sure you install the new fan in the correct direction.
I usually replace all the fans at once, if one goes bad the others may not be far behind it, but if you already ordered it, don't worry.
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Specifically I need to know about taking the back cover off to access the colling fan. I assume you just remove the Phillips screws that are visible to remove the back cover, while keeping the monitor in a vertical position. From there can you access the fan unit? As far as i know there is only one cooling fan on this unit.
Yes that is correct, I can not say for sure, but I think you can leave it upright.
Some plasmas you have to lay face down because the stand blocks removal of the back.
Replacing the fan is usually easy .
Tommorrow I will check the manual and post if I see anything different than what we already know.