I have Original Xbox, I had it since it was released...
recently I powered it up, HDD keeps on spinning like crazy and never stops.
I got the green screen with "contact support".
I pulled the HDD 20GB and tried to connect it to my desktop, the HDD spins with none stop, and the drive was not shown/recognized by my PC.
I am not sure if I install a new IDE HDD would work/boot.
I searched for Xbox OS/dashboard to download so that I can install on the new HDD, it seems that I only need to install the HDD, and the Xbox will load from the build-in eprom/chip.
Please correct me if I understood wrong