I tried replacing a bulb on your peugeot 206 hdi and now it wont start?

If your Peugeot 206 HDi won't start after replacing a bulb, it could be due to a few reasons. Check if you accidentally disconnected any electrical connectors or fuses while working on the bulb. Also, ensure that the battery is fully charged and that the connections are secure. If everything seems fine, you may want to consult a mechanic for a more thorough diagnosis.