My colleagues gave me a bonsai when I left the company. I loved it and it was georgeous. When I switched to my actual house, the bonsai felt it and started to dry out. I could not stop it, and even transplanting it to better soil and placing him in another room. It never went up. Right now I don't know if its alive anymore, and makes me very sad.
Do you know the species?
Yep. It's supposed to be an entry level one. Ligustrum sinensis. In my old house had like 8 hours of direct sun and right now it only has like 2... I don't know what to do anymore.
Most of these are outdoor trees, regardless of size. Something more tropical might fare better inside.
Ligustrum are notoriously hard to kill so if is not showing any activity over ground, may be working hard building roots at this moment.
The shadow is not really the problem. They love full sun, but can stand a lot of shadow. The lack of water or nutrients may be. Let it fully submerged in a bath for one hour. If is still alive, the bark or stems will turn greenish and new leaves may appear in a few days.
Sinense is semi caducifolious (if I remember correctly). Are you in spring or in autumn currently in your timezone?
(If you have pets take in mind that this is a poisonous plant with poisonous fruits only allowed for birds).
Would artificial light work?
With this species, yes, for sure.
I had a fig at my work desk for a couple of years. Work moved buildings. The new aircon killed it. No matter how much I watered it, it kept drying out.
It was still trying to live off its two remaining leaves, when I picked it up by its trunk and noticed it was completely hollow and almost made of paper. It was utterly desiccated.