Question: I just received an old 3D printer from one of my school teachers. I have no idea whatsoever as to which brand it is, no instruction manual attached to it, or any other info about it. 

How can I find some information about it? 

Some links would be very useful. Remember when giving advice that I know nothing about 3D printers. 

This is the printer:

*Backside*
[![Printer as seen from the back](https://i.stack.imgur.com/GC3mb.jpg "Printer as seen from the back")](https://i.stack.imgur.com/GC3mb.jpg "Printer as seen from the back")

*Front*
[![Printer as seen from the front](https://i.stack.imgur.com/FmDtw.jpg "Printer as seen from the front")](https://i.stack.imgur.com/FmDtw.jpg "Printer as seen from the front")

*The X-axis stepper*
[![The X-axis stepper](https://i.stack.imgur.com/OXuiX.jpg "The X-axis stepper")](https://i.stack.imgur.com/OXuiX.jpg "The X-axis stepper")

*The electronics board*
[![The electronics board](https://i.stack.imgur.com/YTJwl.jpg "The electronics board")](https://i.stack.imgur.com/YTJwl.jpg "The electronics board")

Answer: 
This is an old 3D printer that looks a lot like the [Mendel](https://reprap.org/wiki/Mendel) or a simpler remix of the Mendel (the [Prusa Mendel](https://reprap.org/wiki/Prusa_Mendel)). I think this is a Mendel you have obtained, it was released in October 2009.

This is a printer type from the early days, a lot about these printers can be found now that you know the type. These old types can be constructed from printed parts and hardware store materials. Nowadays, metals like steel and aluminium sheets or aluminium profiles are more commonly used.
As far as I can see on the pictures - the main board shall be capable to upload Marlin software and run smoothly.

If you connect power and PC/Mac over the USB connection, then using [Pronterface](http://www.pronterface.com) you can validate mechanical movements of the printer.

As the rods looks a bit dusty - please clean them with a soft cloth and degreaser to avoid jamming.

If you have any issues you could flash a new version of the firmware - please use [this answer](https://3dprinting.stackexchange.com/a/5849/9730), to the question, [How to upload firmware to reprap printer?](https://3dprinting.stackexchange.com/questions/5848/how-to-upload-firmware-to-reprap-printer), as a guide to how to upload firmware to the printer.