I have an Amilo M7405. It's problem is that when it's fan starts to work, it doesn't stops itself and is working continuously. It's not so noisy but I'm afraid if it works like this it may get broken very soon!!
I installed a software to check the Temperature of CPU and hard-drive, CPU is always on 11° ( is it normal or correct?) and when the temperature of hard drive reaches to 35°C, the fan starts to work continuously even if I don't work with my laptop!!