Hi Julian,
I have a quick question as I am in the business of Laptop Batteries and Chargers.
Is this the original charger for your laptop. The reason that I am asking is that if the charger is not powerful enough for the laptops requirements it will overwork and get very hot.
In other words you laptop may need a 90W adapter but you may only be using a 65W or 75W adapter.
Maybe if you could let me know the following I can take a look for you.
1. make and model of your laptop
2. On the label on the bottom of the laptop. What is the Input Volts and Amps
3. On the lavel on the bottom of the adapter. What is the Output Volts and Amps.
It sounds to me like you may be running an aftermarket adapter as most don't come with built in fans.