Print jobs in queue for printer, but not printing

My daughter 1000 miles away has this problem: She was printing from her laptop to her printer when the color ink ran out. She replaced the color ink cartridge and the printer no longer prints. She took out the cartridge and put it back in. She purged the print jobs and resent them. She turned off the printer, restarted the laptop; tried again several days later. The copier function works. She doesn't know if the scanner connection to the laptop works.
Do you have any suggestions of what she can try to get the printer to work again?
Thanks