This is the 4271st most frequent Japanese word.
備え付け
Installed; furnished; provided.
Here, 『備え付けてあります』 indicates that the desk has been installed or set up as part of the room's provision.
部屋には新しい机が備え付けてあります。
The room is equipped with a new desk.
『備え付け』 is used as a noun modifying 『テレビ』 to indicate that the TV is a fixed or installed component in the rooms.
ホテルは各部屋に備え付けのテレビを提供しています。
The hotel provides a TV in each room as a fixture.
In this sentence, 『備え付ける』 refers to the action of installing or setting up the furniture by oneself.