Just bought a Roland vp540, need an easy answer please

Okay, so i just purchased a used Roland vp540. Test print was perfect at the time of purchase, locked down the head and clamped the waste ink lines before transport. Brought it home and got it plugged in and everything, did a test print and the black was off a little, figured it was from the ride home and everything. Was going to do a few test prints to get the ink flowing good again, and do a quick clean on it, but my magenta ink cartridge is empty now and wont let me do a test print or clean on it. I was given a few extra black ink cartridges and some cleaning cartridges with the machine, but no extra magenta. I ordered all new cartridges, but wont be here for a few days. Is there anything that I should do before i receive my new cartridges? Or will my machine be okay until i receive the new ink?

 

That is my problem. I don't know of anywhere local that i can purchase any. Im located in Decatur, IL. Being that it is Veterans day today isnt making it easier either. I purchased a new set of each color last night and got overnight shipping on it, the supplier is about 2 hours away from me, but its still going to be atleast monday-tuesday before i get it in the mail. Do you think it will be fine? I also have the two cleaning cartridges on hand as well if there was a way i could use them to do a clean before i receieve my colors, but I do not know anything about those

 

I put back in the empty cartridge and got it to do 2 test prints and everything is back to normal now. The cartridge is completely empty now, do you think I will be okay for 2 days while i wait for a new cartridge?