Error 5100 repeated

Error 5100 first appeared due to pwer failure, and I corrected it with several different strategies, for example asking for a scan work instead of printing, that usually worked and re-set it. However, now it failed during printing and I can not get it to work at all. I tries to scan and then the scanning task is cancelled automatically.

Also, i have tried to align the printing and i keep on having problems, the lines are broken in some cases and the only time it prints ok is when I do texts and I use small type (palatino 10 for example)

Please help !!!