I just bought a new eMachines PC to replace my old one whose motherboard had died off. I want to get the data off my old machine - so I plugged the drive into the part of the connector ribbon marked "slave". But when I next booted up the system it said something about there being no operating system. So I disconnected my old drive and everything went back to normal again. Any thoughts what the problem might be? Perhaps dip switch settings on one or both drives?