Hi Adriana,
If you suspect a hardware issue it would be helpful to tell us something about your hardware.
Operating System
Graphics Processor and Driver
CPU
RAM
OpenGL support deficiencies of the Graphics Card and/or its Driver are common issues.
See this sticky post:
Another possibly is the improper use of SketchUp’s Layer System
Importing improperly prepared CAD files is often the root of layers issues in SketchUp.
The fastest way for us to determine the problem(s) is for you to allow us to work with the model.
File attachments here in the form are limited to 3MB.
If the file is larger, upload it to a file sharing site like Google Drive.
Then come back to this topic, post the link and we’ll have a look.
-Geo