Yes sure! Only then I'll have to recalibrate everything again! Ouff !!
If you have the GPIB option you can backup up the cal data, replace the RAM, and then put the cal data back.
Otherwise, you're right, it's probably not worth the time.
Are you still seeing the TEST 04 FAIL 12 message?
By the way: can the calibration be done in stages or must it be completed at once?
The service manual says that you can do a section at a time, but it's not recommended. There's a couple of paragraphs about it at the very beginning of section 5, and repeated throughout the procedure along with specific caveats about skipping some of the steps.
If would be nice if it would say *which* value was out of range, so you could try re-calibrating just that section (if that's what you're thinking), but I don't know of a way to figure it out except by trial.
If you want to try removing J500 and J101, and putting in two jumpers on J101 across 1-3 and 6-8 (you'll see those positions marked on the board), the scope will think it doesn't have any options installed. In this configuration many things won't work, but it should boot without error. I'm going to guess that it won't check for limit errors associated with options if it doesn't think there are any installed, so if the TEST 04 FAIL 12 goes away, the bad calibration value is probably associated with one of the options. At least that would narrow it down.