If I remember correctly you can remove the HDD. But someone who knows for sure might chime in, or just try it We still have a few, but we try to weed them out when we have a call on one.
I could not find such a code. In other hand there must be a part of machine's firmware on the HDD. So my opinion is that machine could not work without HDD.
HDD is only used for storage but I don't think it will run without it. 2 questions...1 did you replace it with the same size drive and jumper settings, and did you run the format command? 08/690.
i agree with emju
try 08 690 if it is not work swap the hdd out.i get a look at service manual and the 2570 the same copier have the hdd like an optional.so i think it works alo without hdd.
reguards harry