51
HP Customer Care by Phone
✻
Long distance charges may apply in different regions.
Before placing a call for help, please make sure that:
1 You have checked your Quick Start Poster, this User’s Guide, 
and the Reference Manual for installation and 
troubleshooting tips.
2 You have checked HP Customer Care Online for product 
help. See page 49 for HP web site addresses.
3 If you are in the U.S., call HP Customer Care Audio Tips, 
our toll-free automated support line at (877) 283-4684 for 
fast and simple solutions to commonly asked HP DeskJet 
printer questions.
4 If you cannot solve your problem using the above, then call 
an HP service technician while you’re in front of your 
computer and printer. Before you call, be sure you have the 
following information:
- Your printer’s serial number (the label is on the printer’s 
bottom).
________________________________________
- Your printer’s model number (the label is on the front of 
the printer).
________________________________________
- The model of the computer.
________________________________________
- The version of the printer and software program (if 
applicable).
________________________________________
Then we can help you with your questions immediately!
Region
Phone Support 
✻
DeskJet 640C 
Series
North America
(Including Canada) Fee based
Asia Pacific 90 days
Europe 90 days
Latin America 1 year