I got sent a 3640 as a replacement for a 3620 but i got sent a DC model by accident. The question is can I put the 3620-AC power supply in the 3640-DC? Or is this a big NO? I haven't looked inside the 3620 to see the connection it has, so I'm not sure if its even compatible. --- Roman Volf Keystreams Internet Solutions 1-619-572-2062