How do I troubleshoot a Ford Mondeo that won't start?

I've been having trouble starting my Ford Mondeo for the past few days. When I turn the key, nothing happens and all the lights on the dashboard come on. What could be causing this issue and how can I fix it?

First, try checking the fuel pump and fuel filter. These are common culprits for starting issues in vehicles. If those seem fine, it could be a problem with the ignition switch. It may also be a good idea to check the battery and connections.

It could be an issue with the starter motor. Over time, they wear out and can prevent the car from starting. It's also important to check the spark plugs and ignition coils. If those are malfunctioning, it could be preventing the car from starting.

Based on my experience, this could also be a problem with the engine control unit (ECU). It's responsible for controlling various engine functions and can cause starting issues if it's malfunctioning. I suggest getting it checked by a professional mechanic.