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?