My Cd-rom is a Creative "QUAD SPEED" ide Cd-rom (connected to internal ide ofA4000). I don't use it much - got ethernet/adsl. But it's always cool to fix tings.
@lempkee:
No, I haven't removed any shielding. :-) I would really want me one of those FastATAs...
@DanDude:
Yes, I have an multimeter and I will test the voltage between the wires. Thanks for the tip. But since the Cd-rom works fine after some time, I think the malfunction is in the Cd-rom, not in the machine.