Not my design,

Reuploaded from printables https://www.printables.com/model/93315-110-scale-miniature-pc-with-internal-components

Author:

A very small pc with internal components.

The .STEP file is included if you want to create your own components for it.

Print with resin for best results.

The side panel is optional and can be printed with clear resin

Resin:
Inland Standard Resin Gray 
 

Notes: 

Print orientations are shown in the last picture. Most parts should not need support but "Case.stl" could need some on the overhangs in the back.

Printed on a Creality LD-002H

Post-Printing

You may have to trim some parts down with a small hobby knife or some needle files to get them to fit.

If parts are too loose then you might have to glue them down with superglue or edit the step file to make the tolerances smaller.

A little bit of paint will probably also make it look better.

If you really wanted to you can scale it up and print with a normal FDM printer but the tolerances between the parts would be wrong.