HP says that the error 50.00.19 and 50.00.22 come frome defective scanner/laser from one of the colors CMYK and that it can be fixed by turning the printer off and then on or check the scanner/laser connector or replace the ...
If your printer is in good condition and your printer still have toner or ink but it prints empty white pages or very weak black / colors then probably you will be able to fix this problem by following these ...