I have same problem I looked up the error code and this is what it gave me hope this helps. For me im just going to buy a new printer as it will probably be cheaper than trying to fix it.
Description F4 Error
The head drive voltage has dropped from the high to low level in an abnormally short period.
The head drive voltage has not risen to the specified level within the specified period in the self-diagnosis.
Causes
Piezoelectric ceramic actuator defective (Cracks or rare short) Main PCB defective
Hi Sarah,
I have same problem I looked up the error code and this is what it gave me hope this helps. For me im just going to buy a new printer as it will probably be cheaper than trying to fix it.
Description F4 Error
The head drive voltage has dropped from the high to low level in an abnormally short period.
The head drive voltage has not risen to the specified level within the specified period in the self-diagnosis.
Causes
Piezoelectric ceramic actuator defective (Cracks or rare short) Main PCB defective
Llew Cleaver さんによる