Hi Jupp3,
It sounds like one or more of the DRAMs on the motherboard are bad. Since these DRAMs are soldered to the motherboard I know that you did not "swap" these. With the cover off and the Amiga 2000 running touch the top of each DRAM with your finger one chip at a time. Make sure that you place your whole finger on top of each DRAM and hold it there for a few seconds. If a chip feels hot then that is the one that needs to be replaced. 44256 DRAMs are very hard to find, but I do sell them from time to time. Let me know if you need any. :-)
