I just gutted a laptop and pulled a 15.6 monitor out. I ordered an HDMI LCD Controller for $26ish from Amazon and it work wonderfully. It’s light, bright and the controller came with buttons to control the screen.
There are some that are cheaper. I just didn’t want to chance that it wouldn’t work with my laptop lcd model. I searched and bought based on the part model.
I literally just did the same thing. Took apart an old laptop and ordered a controller board on Ebay. I see people giving away old monitors all the time on Craigslist as well, just keep your eyes peeled.