What causes the 'No start' problem in an Audi 80?

I have an Audi 80 that won't start and I'm curious about why this might be happening. It seems to have enough power to turn on the dashboard lights, but the engine just won't start. Any ideas on what could be causing this issue?

The most common cause of a 'No start' problem in an Audi 80 is a dead battery. This can happen due to old age, extreme temperatures, or leaving the lights on overnight. Check the battery voltage and if it's below 12 volts, you'll need to replace it.

Another possible cause of a 'No start' problem in your Audi 80 is a faulty starter motor. If you hear a clicking noise when you turn the key, this could indicate a problem with the starter motor. Consider getting it tested and replaced if necessary.