harrievandalen:
This is Harrie and I blew the processor of my Atmega 2560. I removed the controller and replaced it with a new one. It does not work, so I first thought there might not be a bootloader inside, but I checked and also the clock is not running. Can anybody help me out?Harrie
Impressive SMT skills! If you didn't program a bootloader onto the replacement chip it won't have one. You need to use the ICSP header and some programmer (or another Arduino) to try programming the 2560.
I think the AVR default fuses use the internal clock so you wouldn't expect to see the xtal oscillator running till it was first programmed - but could be wrong, anyone know for definite?