Hi,
You may refer to these articles and check if this helps.
'Ink System Failure' or a '0x ...' Error Message Displays on the Control Panel: http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01458034&lc=en&dlc=en&cc=us&product=3560280
0xc19a0020 photosmart B110: http://h30434.www3.hp.com/t5/Other-Printing-Questions/0xc19a0020-photosmart-B110/m-p/1978157/highlight/true#M71787
Alternatively, you may also post your question here: http://h30434.www3.hp.com/t5/Printers-and-All-In-Ones/ct-p/InkJet
Thanks.