Objects, any of them are not visible in 3D view even if all layers all visible. I can view an object in 3D if only one object is selected. Example: if place shower cabinet into the floorplan, I can see the object symbol. When I select the object by command ctrl+F5 or by F3, the object is not visible. When I use the command F5 or marquee tool, the object himself is shown.
If into the plan is added any other items, in example wall, the object is not visible.
This problem occurred suddenly when PC was in maintenance. Previously everything was normal.
As I suspect, there are some settings to change, but I have not found the right one.
If you can see walls and slabs in 3D but not the objects then I would look at the renovation filter that is active and/or the renovation settings of your objects.
If you can see nothing in 3D then change to the Internal Engine.
If you can see the 3D now then I would think it is an OpenGL issue.
Try updating you video drivers, or you say there has been some PC maintenance, so you may have to revert to the original drivers if that has been changed in the maintenance.
One of the forum moderators. Versions 6.5 to 25 Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10 Dell Precision 3510 - i7 6820HQ @ 2.70GHz, 16GB RAM, AMD FirePro W5130M, Windows 10