HP 400 - Manual (Page 74)

Problem Resolution 5-11
5. If the printer has a carriage stall error condition, look for
obstructions or binding along the printer carriage path.
Slide the print cartridge cradle back and forth across the
printer mechanism. If the problem cannot be resolved,
return the printer for repair. 6. If the printer has a service station motor stall error
condition, look for any visible obstructions around the
service station (right end of the mechanism) that may be
hindering the service station operation. If the problem
cannot be resolved, return the printer for repair.
7. Turn on the printer. The carriage should move along the
carriage path and return to the home position.
– If the stall problem recurs, look again for anything that
may be causing it. If there are no visible causes,
return the printer for repair.
– If the printer operates without a stall, monitor the
printer during printing operations. If the stall problem
continues to occur, return the printer for repair.