Do this:
Turn on your MPC.
Enter programme mode
Highlight the programme name and press WINDOW
Delete ALL programmes
Then do a PURGE
Now go to MAIN mode
Highlight the Sequence field
Hit Window and delete ALL sequences
Now Hit SAVE
Select MPC INTERNAL (for destination)
Save ALL MEMORY
This will erase the internal memory and replace it with blank data currently in the RAM of your MPC.
Now whenever you will boot up (without your CF card inserted), the MPC will be loaded with nothing but a blank programme and en empty sequence. No samples in RAM, nothing.
Note that obviously you don't understand the difference between the active memory (the RAM) and the passive memory (the storage: CF, HD, Internal). That's what's getting you all mixed up.
You cant save "Entire Memory" to the internal memory, only "All Sequences" and then "All Programs".
And if you have no program, no sample to save it gives me a "No sample wave" warning. Either you have one 0kb sized sample you can save or ( ithink the easier way) just create a empty folder and assign it as autoload, thats what i do.