Please be back when you get time.
However, please be informed that the issue is with the printhead and you have to replace it with a new one in order to get it resolved.
Replacing the printhead might cost you nearby a new printer itself. If the printer is old, it is not worthy replacing the printhead. Better get a new printer instead.
I understand that this answer may not be entirely to your liking, and I regret being the bearer of information that you really don’t want to hear. But it would be unfair to you and unprofessional of me were I to provide you with anything less than truthful and honest information.
If none of the above produce results, then the printer should be repaired or replaced. Unfortunately, except for business-grade workgroup printers, few modern printers are repairable, and fewer are worth repairing. Most printers are now manufactured to a "replace not repair" standard. To understand why this is the case, consider the cold, hard, real-world cost of repairing a printer.
I apologize for the bad news. However, this is the honest answer I can give.
S H E F I N