# Troubleshooting Overview

## Summary

The eVOLVER system is highly complex and it is easy to feel lost about what happened when something went wrong.

For example, the behavior of optical density readings can vary widely and the underlying cause can be [complex](optical-density-od-readings).

Please look through these troubleshooting guides and the relevant documentation before posting to the [forum](https://www.evolver.bio/) about your problem. It could also be the case that your problem is a [bug](../contributing/reporting-a-bug-hardware-failure).
