Even if an old laptop no longer has the speed you need, the screen might still be worth salvaging as an extra monitor. This DIY project takes you through hooking up the screen and shows a neat stand for it made out of Meccano construction toys.
We've seen previous similar projects like this, such as this monitor-and-plexiglass-stand version. This is just another take, posted by siddv on Imgur.
Some particularly cool features: the controller board and other tech components are mounted to the back of the monitor (so wires aren't hanging loose everywhere), and the metal stand made out of Meccano is versatile and clever.
Check out the step-by-step photo instructions on Imgur.