HP 400 - Manual (Page 72)

Problem Resolution 5-9
Table 5-4. Error Light Patterns
Error Light Indication Probable Cause Solution
None of the lights lit up Internal ROM is defective Return printer for replacement of main PCA
Change Cartridge light lits
up Print cartridge carriage
cannot move Check the carriage path for physical obstruction
Return printer for repair
Paper light lits up Paper is jammed
OOPS is defective
Remove paper or other obstruction from the paper
path.
Ensure the OOPS flag is aligned correctly; return the
printer for replacement of the OOPS flag
Power and Paper Feed
lights lit up Internal RAM is defective Replace printer for replacement of main PCA
Power and Change
Carriage lights lit up Internal EEPROM is
defective Return printer for replacement of main PCA
Paper feed and Change
Cartridge lights lit up Service station stall Check the service station base for movement
obstructions.
Return printer for repair
All 3 lights lit up Filmware logic error or
hardware error Return the printer for replacement of main PCA