要拆卸LS460L的顶棚电视，首先需要打开车门，找到电视屏幕周围的外壳。通常外壳是用螺丝固定在车顶上的，所以需要用适当的螺丝刀来将外壳上的螺丝拧掉。
一旦拆掉外壳，就可以看到电视屏幕后面的连接线和固定螺丝。首先要将连接线拔掉，然后再用螺丝刀将固定螺丝拧掉。
拆卸完连接线和固定螺丝后，就可以将电视屏幕小心地取下。在拆卸过程中要注意不要用太大的力气，以免损坏电视屏幕或相关配件。
拆卸完成后，将车顶清洁干净，并留意是否还有其他配件需要拆卸。如果需要重新安装顶棚电视，可以按照相反的步骤进行操作。如果不确定自己是否能够完成操作，建议寻求专业人士的帮助。
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