What I did so far:
- changed the power supply as it good be a voltage/ampere issue. Unfortunately doesn't solve the problem.
- Cooled down the Raspberry for a couple of hours, booted the device still the same problem.
- Scanned the SD card with Ubuntu for file system problems, there where some problems but they have been fixed, still after starting the Raspberry it hangs within 10 to 15 seconds.
Any other suggestion on how to solve/debug this problem? You support is really appreciated as I cannot control the lights in my house anymore