Hi, I’ll be glad to help with the printer issue.
The error is due to a fuser error. There could be 2 possible reasons for this problem.
1. Bad Fuser which you replaced. Try removing the fuser and cleaning the metal contacts inside the printer using a q-tip if possible. Then re-insert the fuser.
2. The power supply controller module could be bad and not heating the fuser properly. The fuser has to reach a certain temperature before it is ready and can cause this error as well. This problem can only be fixed by a printer repair shop.