PAJ wrote:

Initially I thought about making a hollow door with lap joints at the
corners and a vertical rib to take the TV mount and then cover it with MDF
which will be painted. Then I wondered if I was over complicating things
and I should just use a sheet of 18mm MDF. MDF would be about 12Kg and
the TV about 5Kg so heavy

Are you sure about those weights? I've never measured MDF weight, but a 12
KG door seems heavy to me, especially if the TV is going to be less than
half the weight...

If you make the door with an outer frame, but no diagonal bracing bar
mightn't the thing tend to skew into a trapezoidal shape? The (presumably)
thin MDF you think of covering it with would need to be strong enough to
resist that.

Still, if you're planning to hinge it only on one side I'd think it might
put quite a strain on the hinges and frame on one side - is the door frame
strong enough for that?

If it were me I think I might abandon the idea of a hinged door and instead
plan to lift the TV and door into place, and lift it out when not required.
But that would only work if you planned to keep nothing you wanted access to
often in the space behind it.

Or, I might use an articulated TV wall bracket to support the weight of the
TV and make a very lightweight fill-in panel to cover the void behind it and
allow the arm out of it.

--
Jeremy C B Nicoll - my opinions are my own.

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