The computer does't recognize any drives

[Shady]

maybe you're tryin to press the one in the numpad while numlock is off
i'm kinda runnin out of ideas !!

 

[StrangleHold]

You can take out the motherboard battery for a few minutes, but if theres a setting thats not default you cant get back in to reset it

 

[älek]

I unplugged the DVD drive and the computer booted!
Unfortunately I had no time to try if it booted when having a DVD drive as primary slave. But even if it works that way, I'm not satisfied... I wanna use it as a secondary master.
I'll probably reset the BIOS and see if it changes anything...

 

[Shady]

i dont think u have to reset the bios
just swap between IDE drives if u have more than 2(HDD,DVD,........)
do u have a problem with the DVD being secondary slave ?

 

[älek]

do u have a problem with the DVD being secondary slave ?

I'll try this one in the evening...

 

[älek]

Stupid me.
It works just fine now. I put the secondary cable upside down - this is why the computer didn't boot.
As it's impossible to plug the primary cable in upside down I thought that secondary cable couldn't be plugged in upside down also... I didn't even check

Well, anyway - thank you for your ideas!