Dear Kai,

"I probably didn't understand your posting."

What I meant was a phenomenon that is comparable to the " Phosphor burn-in" in old B/W monitors running DOS. Since most of the time the only display was "C:>" , you could see this image even after you switch off power to the monitor.

Similiar to above, running the same code over and over for a long time, would the corresponding sections of the MCU get into any reliabilty problem?

Raghu