Torben

A qualified guess would be, that it is the CCD sensor that overheats - not the CPU. As an electrical engineer, I am surprised to see how much attention is drawn to the heating of the CPU. The CPU is appartement not the problem - it is not heating up, is has no thermal paste, and it is still not heating up. Most of the power ends up in the sensor chip. It has to move a lot of information in a very short time, where the CPU merely has to move data to RAM and memory cards. The CPU process is much less power demanding than moving analog pixel information around the sensor and converting them to digital. So my guess is, that it is the sensor that needs cooling. It would be interesting to see measurements of the surface temperature of the sensor chip, and to see if there is a relation between that, and the "cool down timing" in the camera. BTW: Silicon is a heat isolator (as well as en electrical insulator). Dispersing heat from silicon is a delicate task, and even more so in a sensor chip, that only have thermal contact from one side.