> For the complete documentation index, see [llms.txt](https://khalil-lab.gitbook.io/evolver/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://khalil-lab.gitbook.io/evolver/troubleshooting/vial-troubleshooting.md).

# Vial Troubleshooting

- [Replacing Photodiodes and LEDs](https://khalil-lab.gitbook.io/evolver/troubleshooting/vial-troubleshooting/replacing-photodiodes-and-leds.md)
- [Heating Element](https://khalil-lab.gitbook.io/evolver/troubleshooting/vial-troubleshooting/heating-element.md)
- [Stirring](https://khalil-lab.gitbook.io/evolver/troubleshooting/vial-troubleshooting/stirring.md)